First you have to realize whether or not you even want to be a medic. What you think being a medic entails, may not be what's cracked up to be and you might get burnt out on it and realize you wasted 9k grand and 2 years of your life.
Secondly, you need to the confidence you gain from running the show as a BLS provider before you can put on the big boy ALS shoes. I can say from experience, what I learned in school has for the most part drifted away from my mind, because I learned how to do my job well from experience and listening to experienced partners.
People say you'll get all the experience you need from clinical time, but I know from my own experience on 911 BLS trucks, and from what medics have told me about school that most of what you do is just BS, and it's only after so many crap calls that you do something decent. You don't want to get out there during your clinical time with zero BLS experience, having never done simple tasks like radio patches, reports to a nurse, or even using a stretcher and have to worry about completing your ALS skills at the same time. Just because you can make it through your clinicals doesn't mean you'll be any good at it.
There's one at my company, a certified medic right out of school who can't get on the road because they can't pass my companies 3rd ride testing. They won't clear them for the road, and now they're stuck being a dispatcher. It's okay to take your time and get a handle on what the hell being an EMT even is before you go to the top of the food chain.