You might not need a mentor.
I think the impulse to look for help from someone who has "made it" is wise. But channel that thinking into doing some research. This forum is the best resource I've ever seen in over 13 years in online marketing for finding good business models to imitate.
And that's really what I'm driving at here: imitation and improvement. Don't try to re-invent the wheel. Trust me, it's been invented many times over in this niche. Think like the Japanese. After WWII, when they were obviously in shambles, they built things literally from the ground up by taking what worked in the West (mostly the U.S.) and perfecting different aspects of it. They imitated, then improved.
Within 3 decades they had one of the largest and most productive economies on Earth. It won't take you that long.
But you may not need an actual mentor. You might just need to spend some time researching to see what is working for a lot of people. Look for reports of success that form patterns. The cream will rise to the top in terms of business models. A few lightbulbs will go off in your head. Pick one and dig in. Imitate. Look for ways to improve it as you get some experience. Find ways to stamp it with your own personality and tweaks.
I say, do that first. If you still come up empty, THEN go look for a mentor. Again, I think your impulse to seek out help is admirable and smart. I just don't think you necessarily need to limit that to being mentored. It can be expensive and it might not really do anything more for you than what you can do on your own.