I don't think it's bad, it just feels like you have to do three times the work to get the same outcome as in Illustrator. I started with Photoshop, and it's perfectly fine, but now I'm glad I switched to Illustrator. As far as how to vector, I found that the Photoshop tutorials here [link] were really good, and if you want to move to Illustrator, check out those tutorials here [link]