Just pick one you like from a role-playing standpoint. You don't have to be the most efficient player ever, what matters is to have fun (and yeah, depending on what companions you bring along, you will have to learn how to manage different classes anyway).
The first character I ever played 17 years ago when I was a literal kid was a bard. Definitely not the easiest class to grasp but it's still my favourite after all these years.
