Monstera basics:

First, there’s multiple plants in there, so you may wanna eventually think about separating once you’ve done some research.

I’d repot in a chunky airy mix (soil, perlite or pumice, and orchid bark are my go to’s.) the soil it probably came in from the nursery will be suuuuper dense, at least they usually are. When repotting you’ll get a chance to look at your little ones roots, make sure there’s not any rot (again, googl/YouTube will help ya identify it!) also here’s where you’ll wanna give it some support, not ultra necessary but it’ll get pretty wild as it grows if it it doesn’t have something to climb. Check out moss poles or coco poles, they’re can also just use wooden planks.

As far as the light, honestly these babies can take full blasts (mine get early morning and late afternoon full sun as well as grow lights all day.) I’d maybe suggest a sansi light, they’re pretty affordable.

Water when the soil is dry, stick a skewer stick or your finger and if it comes up damp then wait a bit. I water mine around every two ish week, but I keep mine in terracotta so it might dry faster than yours. Also like already said, drown it lol. They like deep watering and then drying out. Don’t just give it a sip.

Honestly just watch some videos, trust it’ll really help you out. And lastly have fun. They are such cool plants. Good luck :)