Setting up in a basement has its own unique safety problems and has to be done very carefully. Just type in the word basement in the studio and the safety forums and read as much as you can before setting up.
Learn how to use the formula for CFM. Lots of examples in these forums. Building a Barley Box style hood captures a lot more fumes so they can be safely exhausted. The most important thing is that after your torching session you should feel the same as when you started. No dizziness, light head, headache, tightness in chest, eyes watering, sore neck and or shoulders, burning arms or hands, face burning, metallic taste, sore throat, coughing etc. If you have
any symptoms you need to change something to correct those.
When I torch my fan is usually at 1100 CFM, it goes up much higher because it is a three speed. My Barley box face opening is 32" tall X 4' wide. The actual work bench is 2X4 feet in work surface. The metal hood opening above my work bench is only about 8X16 inches.
I wear a respirator, Long kevlar sleeves and use a face shield instead of glasses. I use arm rests that I built myself that support my whole forearm and allows my wrists to work freely and keeps my head neck and shoulders in a good posture.
This did not happen overnight. It took about three years to get it all tweeked in including the chair to standing part. I like to stand most of the time and dance to the music while torching so we had to adjust the height of the bench, chair and arm rests. But some days I prefer to sit so it had to be easy to switch from one way to the other.
All of this protects me from symptoms that are detrimental. This is how I do it to come away from a torching session feeling as good as I went in. I also only torch for three hours max. Go out and take a long break and come back if I want to do more.
Best wishes for your studio build and remember long hours of research on this forum will help you to build a safe and highly functional studio. Research is your best friend