Recs here for benches and racks are great and I second them, but if you want a less costly and space consuming way to see whether you like the activity before committing, kettlebells are a great way to get started. With a couple of pairs at different weights you can do (versions of) all of the main powerlifting movements.

You definitely can’t hit your legs as hard as you can with a bar and a rack, but kettlebells are much much more “small apartment friendly”. You can hide them in a closet easily.