i just do cardio rn bc i'm focusing on finding a good diet
start simple, do chest for day 1,back for day 2,leg for day 3 in that order and take a rest day after if you're sore(you'll be sore if it's your first time, it'll disappear once you've become consistent). Do around 5 different workouts starting with small weights with 3 sets of 10 repetitions each. If you've got a spotter then you can do failure if you want(do the workout until you can't anymore)