Of course, my sister in Christ! My apologies for the delay in response, I have been busy over the past few days reading and posting on other threads, and engaging with other friends.
That's totally ok! I myself have been busy with my new little baby and over-demanding work.
Your questions are excellent.
1. Were you born and raised Mormon, is your entire family religious?
My immediate family is LDS Christian, with extended family being all sorts of things ranging from very devout, very atheist, very "I just don't care", etc. I grew up in areas where LDS Christians are rare (like you're the only one in your whole school and it's 30+ minutes drive to the church building).
However, each person's faith journey is their own. I accepted Christ as my Lord & Savior at age 5, and had an unusual interest in faith-based topics from a very young age. Even from early elementary read all sorts of books of faith, ask all sorts of questions of my friends (whom were all different faiths), attend services with them, etc. I first read the Bible cover-to-cover at age 9. I did go through rebellious phase in early college and left, not because of faith itself, but due clashes with the sinners at church and my own issues.
2. Have you ever considered converting to another branch of Christianity?
I've thoroughly studied many different branches of Christianity- including months of attending, a crazy amount of reading, etc. And almost always come out having learned more about myself & my beliefs, others & their beliefs, and better understanding/love of others.
Why or why not? Do Mormons believe all Christians outside the LDS Church are saved?
In short: yes. LDS Christians totally acknowledge that non-LDS folks are indeed Christians too and shall be spending eternity joyfully dancing with Christ.
Longer answer: the LDS Christian view of the afterlife is different than mainstream Christians, and I can go into that if you want. But TLDR is the above.
3. Are Mormons generally stricter than most other Christian branches, for example, in terms of behavior?
LDS Christians believe that a disciple of Christ should indeed strive to follow Him-- "if you love me, keep my commandments". Yes, you should actually strive to be truthful, chaste, loving, serve your fellow man, etc. Being a Christian doesn't mean you go to church on Sunday and then spend every other hour kissing mammon's feet. And when mistakes happen (because they totally do), you repent with Christ's help. So, similar to other conservative Christian branches in that regard.
I've heard for example, you cannot drink caffeine as a Mormon, are there things against sugar and other foods also?
Smoking, coffee, tea, and alcohol are avoided as a promise an LDS Christian makes with God. Nothing wrong with caffeine, though I personally really dislike the stuff. Sugar on other other hand... I have a weakness for chocolate. I do strive to keep that under control, as part of taking care of my body (which is both part of being a good Christian just a responsible person).
4. Do Mormons believe themselves descendants of the lost Israelite tribes?
In Old Testament and early new Testament times, being a Israelite/Jew was viewed at a literal ethnic thing. This of course changed when preaching opened up to the Gentiles. It is believed that nowadays all of those promises to Abraham/Issac/Jacob extend to everyone, whether you are a literal descendent through blood or adopted through faith in Christ.
I've read something about them traveling to the Americas long ago (according to Mormon beliefs at least).
It is levied that a small group of Jews (like 5 families) traveled to what is now the Americas in 600 BC, their story / their descendants stories being told in the Book of Mormon. They eventually apostatized and were wiped out. This doesn't mean that they ~5 families only people to ever settle in the Americas - not remotely! Rather, genetic evidence points to the people of northeastern Asia being the primary settlers of the Americas and came in several waves. Heck, there were even some Vikings that briefly settled parts of Canada.
P.S. What exactly do you mean at your last part? Do you mean that you struggle with some things on a personal level? I pray for your recovery and healing - and your peace! :)
I'm not sure which part you're referring to, so I'll answer both.
"OCD honest" : I'm not literally OCD. But I am indeed extremely extremely honest and wear things on my sleeves. This is actually by choice. If someone asked "does this dress make me look fat?", I will answer "Absolutely" if that is the honest case.
Hating proselytizing: proselytizing is different than sharing your faith. And I do hate proselytizing with a passion -- to me that is when somebody just tries to force their beliefs down your throat with zero interest for who you are, what you think, or you saying "no thank you". The proselytizer doesn't care about you at all, and they treat you like a kid playing with dolls. Proselytizing is frequently can be extremely negative: "I'm going to inform you what you believe and why you're wrong so I can feel better about myself!"
Versus sharing your faith is bringing the good stuff you believe (like Jesus Christ is the Son of God), to the table and respectfully sharing it with folks. And then respectfully listen to what they in turn believe. Learn about each other, and frequently you'll learn something about yourself too.