3. This question pertains to the first. I was doing a couple quests which are around my level, 18 to 25, but I was told to leave those quests for my other classes when I want to level them. Is that so? Should I really leave those alone? But then, I want to level my main class as a priority. I'm not sure what to do.

I apologize for all my questions, and thank you for taking your time and patience to reply to them. I appreciate it.