Start with BodyPump. You won't learn much if anything about proper form etc but you'll get a lot of low intensity reps in.

After about 6 months +- you'll plateau. This is good.

Switch over to a 5x5 program like StrongLifts. Read about proper form. Watch YouTube videos about proper form. Ask about proper form. Avoid personal trainers and do this yourself.

I like the SL app since I can mentally check out and just think about form.

Learn to love the squat. Never skip your warmups.

Go from there.