Nancy, hi again..
We are ‘perfect(ed),’ in Christ, when we enter into him and live in that state. Jesus however was born human and already in the process of being perfect(ed) already being into his Father, according scripture. He had the mind of God. Jesus could never sin as his Father’s divine spirit inhabited him (his mind component of his spirit). Jesus’ desire (from the heart) to sin against his Father after being tempted never met the critical threshold. His Father ensured this outcome. How that actually worked or works takes a systems spiritual process engineer and we have none of them here on earth.

That is one of many mysteries indeed.
No Jesus was not perfect, only his Father. Jesus made mistakes as any human being. He learned from his youth the ways of his Father; how to speak, what to say and how and when to say it. No, Jesus was not ‘good,’ only his divine Father as scripture records. Yes, Jesus was the acceptable, perfect(ed) and the chosen human that shed his innocent blood as the sacrifice for sin. I mean he was chosen and planned to exist in the future by his Father, eons before. And then anointed with power as the Messiah, the Son of God.
Bless you,
APAK