You will not find the answers you seek on line from strangers.
Control the things you can. If your credit is messed up get it straight. You need good credit for life not just a sorority.
Community Service - if you don't think you are doing enough do more. *hint if its from HS no one cares what have you done for your community lately
Members: You need to get to know real active members to give you correct information.
For now work on being the best candidate you can be and if the opportunity presents itself you won't have to worry.
Read the other NPHC threads on here - they may be years old but the information remains the same.
There is nothing unique that you need to ask about online. If you've been researching for years you should know this already.
Good luck & delete your other threads. *my community service for the year* (j/k)