Hopefully they will be able to tell you that! Only 3 sessions sounds promising, but i'd check it nonetheless.

Regarding affordable lenses, i've read plenty of good thing about Tamron and Sigma, tho i can't tell much about it from experience (i'm pretty new to this hobby myself).
I know someone who owns a Sigma for her full frame Sony camera, i used it for a bit and i honestly couldn't tell that i was dealing with a more affordable brand.

But only start considering getting other lenses once you've started your new journey and have some experience. You must know what kind of photography you enjoy most, and then find out which upgrades /gear will get your photos to the next level.

I think some basic protection (a case, bag, etc) and a cleaning kit should be your first priority after you get your first camera. Keeping your new gear safe and clean helps it last much, much longer.