Don't buy anything until you do analyses on your room dimensions.
https://amcoustics.com/tools/amroc?l=12&w=10&h=9&ft=true&r60=0.6
There is your room in AMROC and it looks pretty good as far as avoiding modes piling up. It also suggests approx 89 sq ft of absorption (Sabines).
2 inch panels for higher frequencies, 6 inch bass traps or thicker if serious.
REW is your friend.
See this recent thread as well:
https://forum.audiogon.com/discussions/room-analysis-how
You're getting good advice but don't rush to spend money on panels until you understand what you need.
I prefer Acoustimac panels because their backsides are solid ply and it makes it easier to mount onto unusual surfaces.
GIK is a great company as well. Lots of them out in the wild. OC 703 is typical for high frequencies and Rockwool/fiberglass is typical for bass. (not the pink stuff)