I second Dosbo. Do some searching/research and talk to the units. Find out how many slots they have, what their unique process is and how many people are on the waiting list.
Look into the differences between ARNG and Army Reserve.
Additionally, look into the ANG and Air Force Reserves for info.
Some websites should be easy to find with a search of this site.

Two off the top of my head:
Verticalreference.com
Wantscheck.com

Good luck and keep at it. Its a long road to IERW or UPT.