I’m looking for a more active alliance so I can get better
It will be a lot easier if you have screenshots of your heroes and stats.
this is true. most alliances have expectations of its members to join. so you need a certain power, being active and stuff.
What is your team lvl and power right now? Are you an active player in the game? I just started an alliance with another member and we have 20 very active members. You could join us depending on what your answers are to my questions above. 
ADOGG292011 Team Lvl 50 Total Power 51,813