I got some sound absorbers frome soundproofing forum https://soundproofingforum.co.uk/
They seemed to work really well, but you need to experiment a little with positioning.
Alternativly if you hang blankets on all the walls that should damp out alot of reflected noise.
Or drape a blanket over your head and mic while making the recordings.
Get a pop sheild.
And get a decent compressor.