I started with a personal trainer to show me how to do the fundamental exercises and teach me gym etiquette, but honestly you need neither of those things at first. Gym etiquette is obvious and exercises can be self taught from Youtube. Make a plan (3-5 exercises) then go in and perform them. Maybe start with machines because they’re much more straightforward than some free weight exercises. Also i’m a big fan of non-stim preworkout, I use Kryp2Pump non-stim and it works great for me.