My best advice, find work before you come here.
I don't have ties to Serbia like you do. I did however pack up and move to Serbia 2.5 years ago to be with my boyfriend. My biggest problem was work. Still is to some extent but I always manage something. I thank God for that, too.Â
Other than that, the rest is about experiencing it on your own. I mean I could give you the URL of my blog on some of my experiences here. But I don't care of the touristy stuff like clubs and food. Far from. I discuss politics, culture, religion, the real day to day living here. And not living like a pompous rich °µÍø½ûÇø either. I work and live like an average Serb.
Good luck in coming back!