Just get a cheap tent and setup in that. Figure out if you want to go 3x3 4x4, or 5x5, then clear the necessary space in your tent. Ditch that useless corn cob thing, like Jgrow mentioned, it throws lights to the sides, not down.
Edit: Shed, not tent. You have space in a 10x10 area for a mid sized tent that will still leave you room to work, space for inlines, storage, etc.
Get a nice solid 2x4 rack shelf to use as a work space and for storage, and stick a tent in the corner. It's clear as day that you have zero construction experience, so just go tent. Get a real light - ask for suggestions here in a separate thread. Ditch that cob into the trash. Clean up that shit house wiring mess. If you're going to make an attempt at growing for real(even in a small space), budget it out accordingly, and try not to skimp on details. When I was 15yo, I framed up my first grow room, a 3x4 spot that was sano af. Take your time. Do things right. Growing weed isn't rocket science, but it does require attention to detail.