In the past six months, the lesson I've learned that's stuck with me the most is this: even if you don't exactly qualify for everything a job description asks for, apply anyway. You really don't need to fit every single qualification for them to still consider your application, and chances are that you'll surprise yourself by landing something you didn't think was possible.
The trick is to focus your interview on the requirements that you do meet, and show that you are willing to learn new skills to fill in the gaps. Even if you don't have direct experience with some of the things they're asking for, you can absolutely tailor what you do have to make it more applicable for the specific job.
For example, during the application process for this job writing articles for UMass, I did not have any prior blog writing experience, but I was able to showcase my written communication skills in a way that showed I have the capabilities regardless of my lack of experience. I truly was not expecting to land the position, but I was pleasantly surprised when I did and have been really enjoying the experience. Had I not taken a leap of faith and applied, despite having no social media background, I would not be where I am today.
UMass has endless opportunities for you to get involved, and usually all it takes is for you to apply and see where it goes. Of course, you can't expect to land everything you apply for, but if you see an opportunity to apply for a job on campus or for an executive board position in a club, I highly recommend you apply, even if you doubt that they'll choose you. In my experience, it is definitely worth the risk of rejection.