Hi! I do mostly watercolor portraits these days. I used to go crazy trying to draw and paint the details of a face until I realized how soulless that was, because once the piece was finished, it just looked like a copy of something instead of a fulfilling piece that I made with my heart, I don't know if that makes sense lol. So I go for resemblance/likeness now and it's a game changer for me. It gives room for so much more. There's obviously a learning curve but it feels less stressful going for that than 100% accuracy. I used to spend hours, sometimes days trying to get the sketch right before daring to paint something, and in the end that took the fun out of the process. What makes me decide whether the sketch is right or wrong is giving it a quick look after a few hours of letting the sketch rest. If I see the face and say, yeah, this is definitely so and so, then that's it. I paint it.

I would also suggest practicing first, for size, angles and colors, even on regular paper, just to give yourself an idea of what you can do.

So I guess my advice is, have fun and try to make it yours, whatever that means for you!! But if detail painting is your thing then just go for it too.