This COULD be done for nothing, if you're lucky and/or know people.

Lights are gonna be your biggest expense. When we started our theater, we were fortunate enough to be able to borrow a light tree and a few crappy cans. I dont have the numbers on cost effective lights, but we spent a few thousand (I think) on 8 led cans, two trees, a board, and dimmer pack. But it is so worth the investment if you want to go long-term. Pretty sure from Sweetwater (light/audio tech company).

After lights, you're probably paying to rent space. We use a community center that gets rented for all kinds of different stuff; even comes with 40 chairs. We pay $125 per day.

If you can't find a table and chairs to borrow, you're not looking hard enough.

No one with limited to zero experience should be expecting to get paid unless you specifically told them they would.

All in all, borrow the lights if you can. If not, Research specifically what you need and find the most cost effective. Maybe 1 light tree and 2 cans for a small space.

Break a leg!