My overall opinion:
I feel like taking an ACLS class when you don't really know how to interpret EKGs is a bad thing. I think it presents an illusion to others that you hold that knowledge and in turn makes you feel like you know what you're doing when in reality you don't.
Not to knock you personally, but if you don't have the foundational knowledge of interpreting EKGs and using proper treatment modalities in a step by step way to accurately determine a rhythm/treatment then
advanced cardiovascular life support should not be an option or a "badge" or "certification" available to you.
Anyone can play the memory game and learn to recognize a rhythm on a piece of paper and match it up. However, we all know that those lines be lookin funky out there in the field and very rarely is it a textbook rhythm. It is of paramount importance that an advanced provider be able to determine, within a reasonable degree of certainty, a rhythm based on foundational knowledge, not the matching game.
Additionally, there's the old adage that you can show an EKG to 12 cardiologist and get 12 different answers. True, but for our purposes, we need quick interpretation for emergent intervention.
My opinion for you personally:
Taking classes is not usually a bad thing, and any knowledge in your back pocket is a good thing. But I would advise you taking a basic EKG and 12 lead class or A&P instead of an ACLS or AMLS class. It is a logical progression for your EMS career. Moreover, you need to know not just what/how to perform an intervention but
why. And atop of the why is what adverse reactions could you cause by doing so. There is a bigger picture than just learning an algorithm, and that is part of the problem with EMS as a whole and why most of us gripe about increasing the education standards in our specialty. Don't be part of the problem

. I know you are eager to learn, and that is excellent. In time you will.