1. I was waiting to be 18. And the issue of my mother, I had predicted she would be upset about the conversion to "the faith of my father" (you know, it has nothing to do with faith, just that I prefer father
), so that's why I waited a few years. So it was family problem. Eventually, mother has accepted it and from time to time also attend Orthodox services and observe Orthodox Pascha more than earlier, as now with my father we're the majority in the family
2. And issues connected with liturgical aspects, that although it's Orthodox Church, there are some not proper and not correct things (e.g Vesperal Liturgy done in the morning of the Maundy Thursday) and, a minor thing, chanting that I'm not used to, as my roots are Serbian (so, the thing about chant you can call ethnic problem in some way). But in the end I thought that Orthodox Church is still the most Orthodox in the world and despite having proper Paschal Vigil and Maundy Thursday, Roman Catholics don't have the rest of the Holy Week and Lazarus Saturday and very bad, modern "liturgy", and above all, they are heretics I'm still not used to it and probably they're most difficult issues for me now in Orthodoxy, really.
3. There was also fear about very rare taking Holy Eucharist and not meeting a good spiritual father and confessor (before being Orthodox I had a Catholic one, who was accepting my Orthodox views), but I fortunately I was wrong and met wonderful priest, so both these problems turned out to be fictitious.