What a great idea. My advice to the OP is to get a few questions going. I made a similar site for remote work ads but I only had like 2-3 ads on it, expecting the users to fill it up. Well pretty much the initial feedback was that users felt it was a pre-launch/scam site because there was nothing on it. Look up how reddit was started. It took a long time even for them before actual users started to post.