Welcome to the forum and to SS. I have a couple of questions: 1. What is your height? If you are over 6' 225 is not a bad weight but 170 is probably not enough weight. 2. I'm not quite sure why your warm up weights were 5' and 10' advances. But you did find your starting point which is very good. Each day that you lift during the novice stage should show an increase. But your warm up weights need not be limited to 5 or 10. I'm probably not fully understanding what you wrote and if I've missed the point just ignore my observation.
Keep on the path. Slow and steady.