Cool room Zach! I recently re-did my room and added some home made acoustic panels which helped tremendously with reflections. I have included a link to my post which only has a couple of pictures, but you can get the idea. Made all the panels myself for less than $500. They could be done cheaper, but my wife picked some really nice fabric to cover them. I also use a bookshelf as a diffuser on my back wall. Bought the insulation from ATS acoustics, and it was the 2nd most expensive item on the list. Shipping is high, so if you can find a local source, it will be cheaper. Used Bobby Owsinski's book "The Studio Builders Handbook" for designs and also for the formula to figure out which frequencies were problematic. Good luck!
https://www.producelikeapro.com/forums/topic/small-room-treatment/
https://www.atsacoustics.com/cat--DIY-Acoustic-Materials--102.html