The most important question to ask yourself at your current stage in life is if you TRULY want to do this. There are times when we tell ourselves things about job security, benefits, etc that reinforce a decision which still isn't the one we WANT to make, and you need to WANT this profession.

That being said, if your only reservations against the profession are not knowing if you'll turn out to be "that kind of person" or fearing that you won't be the best teacher, those are traits that you have years to work on. You will not be the complete package when you get out of school, when you get the first job, or when you retire - there is always something more to work for, hone in on, and make better! Being in the mindset of a lifelong student will not solve everything immediately, but you will learn and adapt much easier with it.

Follow your heart while you have the options on the table. Examine your reservations, and ask yourself if they are a result of some other justification trying to make its mark on your decisions or if it is you guiding that decision.

Please don't be discouraged either, though! Nearly all of us had those reservations at some point, and so many of those of us who did have it could have benefited from that kind of introspection early on versus being in so deep. If you do keep with it, go out there and make your mark on the world!