Processional - how the heck does this work?

Someone please spell this out like I am a 5 yr old.

Here is our bridal party:

5 BM, 5 GM
2 MOH, 2 BM
no FG or RB

No grandparents on my side. Only my mom who will need an escort (i would assume my bro who is a BM).

set of grandparents on FH side - they walk together. Single grandma on his side (I would assume his bro can walk the grandma, but his bro is one of the best men).

So how does this work? Do all men walk down the alse or do the best men stand upfront with FH? If my bro and his bro walk the women, do they come back for the bridesmaids? If I have 2 MOH, do they walk together with no guys?

HELP!

im sure u can do it however u want...but i have 10 gm and 5 bm....im going to have 2 guys walk in with one girl

my brother is also a gm he will walk in with my mom and my moh will walk with just best man..all other bm's will have 2 guys

in my church the groom and best man stand upfront and wait. The BM and GM walk together down hte isle and then th MOH walks before the brdie by herself. Also the fg and rb walk right before the MOH or after I can't remember but thats how it has been in all the weddings i have seen there. 2 of the GM are my bils and will walk my mom down first and go back to walk down again