Can someone explain in easy terms the following, I'm a new player and my first character is seasonal im a 59. 

When does this season end ?

What happens to my character ?

Seems I can only graduate when I complete all challenges ?

what happens to all my Gear and weapons tuvula when or if I graduate?

can I convert my character to regular? Should I? And what happens to all my tuvula gear?

thanks

Looking for a guild with discord