help 9 x 4.30 m

ok, maybe i havent sized the room properly, but that an aproximate, i need help for designign a home studio in this space, consider please that i have medium budget, i really need help because it is like one of my dreams and i am too beginner...

and im sorry, i am no arquitect or something, maybe it is difficult to me to draw plans, but i discovered another place in my house that can be suitable for the studio, but i have some problems, maybe i can explain them and then draw something and scan, i am too stupid for designign in a computer.... 1. its a celing, well, the dictionary says the english word is asotea, ok, it is a third floor and it has a spinning staircase to get there. 2. theres a "dome?" in the middle of it, that gives light to the bathroom downstairs 3. this is not such of a problem, but it has me worried, there is another room, which i use for laundry, i would need an entrance or something. 4. i guess i am the only one understanding this because there are no plans.

maybe this helps...the little alley is to get acces to the laundry

i thought about this