Buy this book:
Just trust me! It's simple to read but the information is super advanced. Ignore the stuff on film camera mechanics, but pay attention to the stuff on stops, fov, etc. The composition chapter is amazing. Even gets into basic lighting. You can find some of the same info online, but this book is sooooo much better.
A normal kit for cinema production is 18mm, 25mm, 35mm, 50mm, and 85mm (sometimes 14mm for on location or 135mm for some stuff), but that's for Super35. The focal lengths you'll need to cover for a "normal" kit are about 28-135mm.
So you're there. A 70-200mm zoom or 135mm f2 would complete things if you like that look, but you can shoot with the 35mm and 50mm alone or the zoom alone or whatever.
You WILL however need ND filters (.3., .6, .9, 1.2, etc.) and a polarizer. You want to keep your shutter speed as 1/50 and your f-stop no deeper than maybe f8 or f11 outside (usually) so for bright day exteriors those NDs are crucial. Most frequently ignored part of a complete kit, maybe. And get a nice fluid tripod, too.
+ 1 I have the same book and it is great. Love the illustrations.