What do you mean you don't know how to show them your affiliate product?
Also, i would try to make that list a bit bigger. And i would find some popular cheap products on aliexpress, make online store and make facebook ad with that email list. If your list has emails of people who are really interested in gaming niche, you could earn some money.
Learn about dropshipping, retargeting, facebook ads.
Make WP + Woocomerce website or shopify, and try to make some money.
you would probably need to invest at least $100.