Not to get into much detail, but I have a strained relationship with my immediate family.
I have been and am still in this situation, meaning that there has been amazing improvement in some relationships, but not in others.
Even before I became a catechumen, I realized I wanted to and must forgive my family, but I was only able to speak to one of them, who was fortunately totally receptive, and also obviously wanted to improve the relationship, which had been our mutual desire for some years. However, old patterns kept repeating when we spent time together, which caused us to continue getting on each others' nerves, to say the least, lol.
After I found the Orthodox church, became a catechumen, and learned to pray, I asked Mother Mary, the Theotokos, to help me and my family, and the improvements were immediate and have continued since, which was one of several things that I experienced that convinced me how important the Orthodox church is because we need it in order to learn how to pray, how to follow God's law and will, etc.
The family member with whom my relationship has improved so drastically, I would say miraculously, was someone that I could easily see as often as we wished because we lived nearby each other, but there was another close family member for whom I've prayed, but there has been no change. We don't live in the same city and I still to this day have great difficulty forgiving, so it's likely because I am not ready and/or the other person is not ready that nothing has happened. There has been no occasion for us to meet, which might have been for the best if we're both not ready as it would just be awkward and uncomfortable.
I believe it's been the biggest thing holding me back that I have not overcome.
For me, it seems that the inability to forgive is one of the biggest things. God knows this about me and I believe that because I entered the church, learned to pray, and have asked Jesus to order my life as he will, that I am being helped to learn how to forgive and let things go. I believe God helps me to see my fault with more clarity as time goes by and to take advantage of opportunities to improve as much as I am able, which I think is how he helps all of us on the path to salvation when we are willing to accept his help and guidance.
It really looks like the one family member with whom my relationship has improved was able to put everything in the past rather quickly, like in a couple of months it seemed, whereas I am taking years, but that's what I am able to do. If I persist, God will keep me on track and things will improve.
I have an intuition that because of God's help, eventually I will be able to forgive and love the other family member(s) for whom I still harbor some resentment.