Suggestions for connnnnnnnnnnnnnnnnnnving shed to music room

[Adrian19622020]

I am a new songwriter and am looking to convert my 3m x 2m shed into a place I can go and write music without annoying the neighbors too much.
I have a limited budget so I want to keep it as inexpensive as possible.
It does not have to be recording studio-level just enough to not annoy the neighbors.
I am considering Producers Choice Blankets from the USA.
I am located in Adelaide where the temperature in Summer can reach 40+ degrees Celcius.
I would appreciate advice only for now, please!

Western Wall.jpg

[Adrian19622020]

My apologies for the repeated letters in the post. My computer is playing funny buggers on me.

[Paulus87]

Thin metal shed, also presumably far from air tight?

To do this cheaply is unrealistic - you'll basically need to build a whole new structure within the metal shell. I think it would actually be easier to build from scratch.

Blankets aren't going to do much of anything, other than make your shed's interior sound less reflective.