How to find affiliate links I can promote?

Hi everybody!

So lately I wanted to try out affiliate marketing.
I sold a few products (nothing big tho) on Gumroad before, and I love their easy way to create/give out affiliate links to others
But now instead of creating my own products, I would like to try out promoting others' products (it's best if it's on Gumroad so the "logistic" is easy for both of us).

I've never done this but I also don't plan to do it in spammy ways (it would clearly hurt one's product reputation), I have a few methods I would like to try out which are ethical and interesting.

Did any of you have any experience with this?
What would be the best way to collaborate and get affiliate links of gumroad products/creators?

I'm flexible when it comes to niches. Any advice is appreciated, thank you!
(If you want, you can share your whole journey/experience here. Or if you want to do it privately, just reach out to me on twitter: @OctopyD)