Med Term is very relevant to what we do. It is important to your academic training as well as practical application. I promise you that co-workers won't mind explaining to you what a word means, ONLY so many times. If you are always asking they'll start to view you as lazy for not learning the terms before coming to work.
Medical Terminology isn't that difficult, it just seems so. But there are some very basic rules that you will learn that makes it all easy. If your textbook is a large hardcover book, it may very well be useless. I don't know that for a fact, mind you, but medical terminology was recently redefined to focus on rules than on latin or definitions.
For beginners, learn some of the x-rules. That is, start by knowing that you go from the end of the word to the beginning. And make the root of the word "X". Ok? So, phlebitic is phleb-it-ic, which is x-itis-ic. You can figure it out then as PERTAINING TO - INFLAMMATION - OF X (itis = inflammation). Well what is phleb but VEIN, right (look that one up too)?
That's really general knowledge and won't take you far alone, but the rules are what are important. Don't spend all your time reading a freakishly large textbook when you can learn the rules and practice them instead. When you master the rules, you'll be ready for the advanced stuff.
Learn smarter not harder. And good luck!!