150 hours...might be enough, might not. Even more dangerous is that you are planning to apply for med school this cycle without any idea on how you will do on the MCAT.
From experience, you will over extend yourself if you apply this summer. You are taking classes, volunteering, doing extracurriculars, studying for the MCAT, and writing your personal statement/activities for AMCAS. Do you have your letter of recommendations ready? How many hours are you committing to studying for the MCAT? How many hours will you be working on your personal statement? All these little activities will build up and overwhelm you if you are not careful and you might wind up with a half ready primary application and a bad MCAT score.
Slow things down and take a gap year. Keep in mind that you are competing against applicants who have been at this game since their freshman year of college and many years for the non-trads. You've only been doing this for a little over a year.