Make sure to weigh these options carefully:

• Canon RF 50mm f/1.8 STM: best for low light, but very tight.
• Canon RF 28mm f/2.8 STM: safer width, just be careful with f/2.8 indoors.

I used the Canon RF 50mm f/1.8 STM indoors but be careful, it is super tight. I would suggest hunting for a used Canon RF 28mm f/2.8 STM to save money.

TL;DR: Grab the Canon RF 50mm f/1.8 STM because nothing else fits that $200 budget brand new while giving you f/1.8 for low light. Honestly for $200 you are kinda stuck with the 50mm if you want something new. Its a solid little lens tho and definitely kills the kit lens when it comes to sharpness and background blur. Since you are doing a wedding soon, that 80mm equivalent focal length is actually perfect for headshots and candids from across the room. You wont have to get in peoples faces which is always awkward. Just keep in mind for the cats in a small room you might find yourself backed up against a wall to get them in frame. Quick tip for the wedding: dont be afraid to bump the ISO a bit if you are still getting blur. Even with a fast lens, indoor weddings are dark. A sharp grainy photo is always better than a blurry clean one every time. I actually visited Seattle last winter and the lighting is legit depressing. I remember trying to take photos at a park on a Tuesday and it was so grey I thought my camera settings were broken. Ended up just going to a tiny coffee shop and spending way too much on espresso instead of shooting. Those PNW winters really force you to learn how to use fast glass or just buy a lot of floor lamps for the house. Anyway, the 50mm is the best bang for your buck right now if you cant find a deal on the 28mm. But yeah, good luck with the wedding shots!

Just saw this and had to jump in because I love my R series gear! The kit lens is basically a paperweight indoors, so I totally get the frustration. If you want something reliable that wont fail you when the light gets low, you gotta ditch that f/6.3 aperture immediately.

• Canon RF 50mm f/1.8 STM: This is the absolute goat for budget shooters! It is so fast that your low light grainy issues will basically vanish. Amazing for cat portraits and it feels really solid for such a cheap price.
• Canon RF 28mm f/2.8 STM: Super reliable pancake lens that makes your camera tiny. It is much better for small rooms but f/2.8 isnt quite as magic as the 50mm for blurring out the background. You might have to hunt for a used one to stay under $200 tho. Honestly, for the wedding, just grab the 50mm. The reliability of that extra light from f/1.8 is a total lifesaver when the sun goes down or the venue lighting sucks. It takes fantastic photos that look way more expensive than they actually are!