1. With the flight training being successful with no failures, GPA will just be something they may discuss shouldn’t be a problem getting a call.
2. Volunteering is just that..being a volunteer. Nothing specific, just doing something in the community. Don’t know how much weight it carries in the scoring.
3. The best time building is something with an excellent training program e.g., military or 121 and a reputable 135. With 121 training events they get reported to Pria which seems to be desirable.
4. If you can build a lot of ME time to justify the MEI then definitely not a bad way to go to help get the time for the regionals.

Finally, keep your nose clean with the law and employers. Keep doing your very best in training and you will end up right where you want.