The acoustics in your room are SO IMPORTANT.
I have perhaps the largest (and growing) range of Acoustic Treatment options for New Zealand home studio musicians.
Check out Acoustics for the Walls or Ceiling.
There are also the items needed for fixing them to surfaces.
For acoustic treatment products which do not need to be attached to a surface check out Close.
You can also just look through all the options, but if you find yourself a bit overwhelmed,
please book me in to create a custom solution for you, your room, and your budget.
(I have higher end and much cheaper options which are only availabe via my consulation)
Lastly - When you have dealt with a good amount of your issues, the icing on the cake is a Room Tune.