Welcome Mate!
To get into the Market section, if I recall correctly you need 35 posts. But this limit is no excuse to post mindless/worthless posts.
TE mods (and members in general) are good at catching spamming. You would lose reputation (or might even be banned) if caught doing so. If you are active here, 35 relevant posts are possible in few days.
The only way to prove your worthiness I guess, is to help others in resolving their queries/doubts and share knowledge you have.