(1st of all, english is not my native language, so sorry for any mistakes! )

Me and my GF would like to try the game, playing most of the times separately (we work in different time intervals), but on weekends we can play together. We thought about me playing with a human warden, and she would be an elven ranger.
The questions:
- Are those classes good to play solo and/or together?
- We would like to help each other with crafting. What would be the best combination for our characters?
- We are from europe, so the last question is which one is the best european server? (Good amount of players, but not overcrowded)

Thank you for you answers!