Hi Shoukei,
Don't be despair. It will comes a time when you think is time to create your own website.
You can still go to Clickbank and Paydotcom to look for your product. Just that the products might be less then Clickbank. You can try another website Paydotclickbankalert.com. It is similar to Clickbank and Paydotcom. I never have the chance to try its product but you can see anything interest you.
There is nothing much I can tell you how to promote the download service because I don't know how it looks like. But anyway, just go back to that site later in your journey and maybe you will have some ideas to promote it.
Animation can be a good niche and you can sell poster and action figures to the same customers. Someone I graduated with made quite good money by just selling animation.
I search for animation affiliate program and found this site, you can have a look at it:
Best Anime Affiliate Programs
I am sorry that I can't comment on the affiliate programs in the site as I am having problem with my internet connection. Frustrated...
Anyway, you can search for "anime + affiliate" to look for affiliate programs about anime. By the way, you can use the same mehod to search for other affiliate programs of your interest. Just replace anime with the keyword of your interest.
You can also promote World of Warcraft guide or walkthrough in Clickbank since you are interested in game.
Wow, such long reply. I hope I didn't bore you.
Hope that helps.