Some advise and help would be appreciated ❤️

Im going to the gym for the first time. I used to box for 2 yrs so im not all that weak and im skinny

I have a few questions i want to get straight. Il list them cuz i dont know how else to ask them

• How do i find what exercises to impliment and find a workout plan that includes all muscles (even neck,traps and forearms)?

• How do i find the weight ideal for me so i can last those 3 to 4 sets?

• Should i powerlift if my goal is to build a shredded physique?

• Should i cut and bulk (im rly skinny)? ++ If yes then for how long should each faze last and what is the correct way to do it?

Thank you for your time and happy new years, Also any advise and tips are always welcomed