Getting back unit the program. Out of shape. What are the starting weights per lift? +5lbs per lift or more until it gets hard to hold good form?

Mid 30s dad who gets shit sleep here, but finally got some time to get an exercise regimen going.

For example, it feels pretty useless doing OHP at 45lbs and squatting 85 pounds, at 250 myself.

What should my starting weights be?

What should increments be?

Am I trying to jump ahead and going to get injured?