Do have friends/are you willing to make friends? If you do/are, then you shouldn’t have any problems getting back in.
I’ve played solo for almost 3 years now, but a couple of my friends joined around 2 months ago. The first guy made pretty fast progress with my help, to the point that we’re pretty much equal, and now he’s gone and started helping me help the other two.
Region Chat is pretty cool too. There’s always people willing to help others out. Some veterans will even give staple items to people who are brave enough to ask nicely.