First item on the program, when you say "bought my own digital product" ... do you mean that you've had a digital product created for you, making you the original owner, or did you purchase resell rights to an already existing product created by/for the original owner?
If the former, please reply as such, and I'll follow up with my opinion. If the latter, I doubt you're going to find much if any JV partner support ... as although the product is legally yours to sell, most would prefer to affiliate with the original owner of the product, IMHO. That's not to say you shouldn't set up an affiliate program and actively try to attract affiliates, just that having an affiliate program available and pursuing one on one JV relationships are 2 different things.
Additionally, as a one time Internet Marketing start up consultant, I would always wait until my students and followers were somewhat successful as individual online business owners, with established, receptive audiences, before suggesting they branch out into JV Marketing.
You want to make sure your own house is in order before inviting company over.