Where to start treating my room.-Acoustics Forum-Acoustic Fields Forum

Hi all, new to the forum. Any and all help is appreciated. I started to fill out the room analysis form, but it looks like here is a better place to start based on the disclaimer at the bottom of the page.

Info from my room analysis form:

W: 9ft 3.5in H: 8ft L: 12ft 9in
Floor type: Laminate with underlayment
Walls/ceiling: drywall – ceiling is popcorn style
Average listening levels: 75-85db C-weighted slow response based on iPhone app
Number and diameter of speakers: Two monitors with 5 in. low/mid drivers (41w) and 1 in. tweeters (41w). One 10 in. down firing studio sub woofer (200w). Crossover at 80Hz.
Additional room features: Window behind monitors at front wall. 59″Hx47″W with loose curtains in front of window. Closet at rear of room. 6’4.5″Wx2’8.25″Dx8’H. Closet opening is 5’11’Wx6’8″H. Closet can be emptied and have bass absorption built into it. Room is for mixing and possibly some mastering. I have built an RFZ with 3″ Safe n Sound rockwool panels.
Average time spent in room: 5-10 hours per week or less.
Budget for treatment: Less than $2000 – Looking to DIY and am capable.