I started with the Fotospeed lith kit, which is sold by Freestyle and B&H. it's a nice easy way to get started, everything you need in one box.
The Fotospeed developer works well, though I didn't like the paper so much YMMV.
OTH, the paper I liked better at the time, and is still my favorite, is Forte Polywarmtone which is no longer available.
If you'd prefer to go à la carte, the Fotospeed developer works fine, as do many other lith developers.
FWIW, I am currently using the Moersch chemicals. With that, you get to buy products made by a forum participant (Wolfgang Moersch) from a forum sponsor, what could be better?