Hello Iceberg and welcome to board!
Yeah, it's not that easy as it sounds first but this is a very good place to learn all kind off things.
From my experience, site like you have now (no trade script, submit script) will convert pretty badly because all are free. I have couple of those kind of sites, but I mostly use them to feed other sites and for that purpose they work nicely.
Design you have looks a nice general TGP page.
Best of luck!