I have a few affiliate agreements. They don't really drive enough revenue to demand much of my attention. The thing with affiliate marketing is, you still need a big audience to make it work. Sure you can promote someone else's product you believe in...but, and this is the hard part, unless you're passively pushing enough toward their product....it's not worth your time. If you spend your time or budget marketing someone else's product to sell it...you're not getting compensated well enough. Sure, cutting and pasting a link into your notes is easy and mindless....and maybe someone clicks on that link...but easy and mindless are things that work at scale. On the other end...affiliate deals usually benefit the product company, not the creator. Do the math...consider what else you might do to drive revenue. I think the bottom line is this...if you have to work at it, at all, it's not worth the effort. If you're going to be good at selling something you should be the direct benefactor of that effort. When you've sold enough of you...to have a surplus...THEN you add in affiliate marketing as a way to maximize.
Or just do it and see what happens. It's all a learning process.