I'm new to the gym and I need all the advice I can get

This is my first month at the gym. Tomorrow should be my 10th session. I have never worked out or did any type of sports in my 27 years of life. I want to build muscle and lose fat so I guess body recomp. I'm at 160cms tall and I weigh 58kgs. I try to go 4 times a week. I have absolutely no idea what I'm doing and I'm too reliant on my personal trainer. I want to rely on him less (if not at all) the next months so I want all the information I could get to understand how muscle building works and to be able to make my own workout routine and meal plans. Please share with me anything you think could help, or sites where I can do my own readings on this:

• safety advice • which exercises work for which muscles • the correct form • how I should decide which muscles to work out on which days • how often I should change my routine • how often and when to add weights • what is a much less embarrassing alternative when I can't get through a set using a machine set to the lightest weight • what I should know about my daily protein and calorie intakes to make my own meal plan

THANK YOU!