Dor
Well, to be fair, the first time I came back I was locked up, so I didn't have much time to deal with it then. Once I was released from Azkaban, I took off again and spent the next thirteen years as a muggle for the most part. But I was around here and there, from time to time, mostly to visit Sirius on occasion. So, I guess I've really been easing myself back into it slowly over the years. Not that that really helps your situation.
I think that people you knew will be more welcoming than anything. You just have to give them a chance. And I'll be here to help out however I can with that.
I'm staying with my brother, so it's not really my place to offer to have you stay here or I would, but I will find you a flat to stay in for however long you like. Would you prefer muggle London or somewhere in Diagon Alley?