Just type in game chat for active clan members. They are super friendly and helpful. For example, they will help you level, you can do duriels together or rotations, and so forth. Most of them are D2 vets as well.
The people here on this forum aren't really that positive about D4 (except a few). The guys here, especially in the forum section, are very different from the actual and active D4 community (most of these D4 haters here stopped playing at beta or season 1).
Most people in the D4 chat in-game are very positive and extremely helpful (especially hc--I'm not sure about sc).
I hope you find a good clan, and if you decide to go to hc, pm me and I will personally power level you for free and help you find good loot and support.
GL!