Hi Lori, It is generally considered a big No No to torch in your house...
Most of the reasons are safety and health related.
Glass splinters, chunks, shards and teensy weensy pieces you can hardly see with a microscope go flying. Fumes, ventilation, replacement air, the list goes on. I guess the least problem torch and fuel to use in a home would be the HH and the 1 pd. cylinders.
Torching can get quite complicated with people such as a Landlord if you rent or your homeowners insurance if you have it. They can cancel it. Your Landlord can terminate your lease because of the fire danger involved.
You may not pass the fire marshall inspection/building inspector if a neighbor complains about your torching in your home.
It is illegal in lots of places to have a 1Lb. cannister in your home..only 1 is allowed where I live in California and you have it in the garage or a shop building. BBQ tanks are usually only allowed outside and only for BBQing....there is a grey area with temporary connections.
Your hose may leak in your home and all that fuel as no place to go unless you have a super exhaust ventilation system installed and your stove hood is not a super ventilation system...it may even be the wrong kind.
I
would clean out that shed and use it, but first you must check out the CC&Rs for your neighborhood restrictions, city or county building and fire codes, your insurance carrier, landlord if you have one
There have been posts where people got the studio all set up only to find out they couldn't have one where they live.
Be sure and check it all out before you jump in.
Be safe.
Lorraine