That is a delicate question...
To create a good relationship with family members, the other family members should want a relationship too.
Take the time to talk with those who you want a relationship with, spending time with them. It is possible that you feel like some of them don't put the effort, and it's okay. Not all family members like each others. And it's fine, when you see that, you keep it cordial, but you know that person won't be your bestie.
Good relationships always have a good communication, on both side. No matter what the kind of relationship it is. So, for family members, it is as much important. Trust is too, but you will all need to gain that trust from one another. You may have same values, same hobbies, same taste in music, same opinions, ect, which is a good thing, but other may have different tastes, hobbies, opinions, ect, too. And if you want a relationship, you all need to make the effort to understand each other, try to see their point of view even if you don't share it. Be open minded between all of you. You can try to be a part of their reality by sharing their hobbies with them, and they can do the same for you. Unless some of the hobbies put one of you in an uncomfortable situation.
Sometime you could have an argue on different topics, it can escalates, but in order to fix those issues, you will all need to put your proud aside and admit where you did wrong (if it is the case).
There is no big secret about a good relationship between family members, and we don't choose our blood-related family. But we can always choose the people who wants to be in our life just as much we want to be in their life.