You need to have some trust on the forum before anyone deals with you as nobody is going to buy courses from you as a newbie without any reputation on the forum and you can avail different free courses for poker and with practice you can have the skill for it with time but maybe you found someone who will be willing to have course from you.
Having trust is not a problem here because I know so many newbies that are selling their products here in this forum and they have no problem. The major thing op need to do to sell his product is to provide an escrow service so that the buyer can be confident enough to trust the escrow service with his fund.