Congratulations on passing the CFI initial! I would absolutely go straight into the CFII, and if you can the MEI. Then, I would do everything that I can to get hired to instruct at MTSU if that is possible. If you have been a good student along the way, then you are already have far more credibility there, than you do anywhere else. I instructed during my final year in college and left to go looking for a CFI job in the real world with 800 TT and over 400 dual given. It made finding that next CFI job significantly easier.