250 miles and I've got a question...

[primal]

So, I'm a new rider and I have about 250 miles under my belt. I'm finding that I'm already quite comfortable riding on the roads, and I'm not hesitant at all to make my 50 mile round trip to the "city" for class. Now, this admittedly seems odd to me, because I feel as if I shouldn't be ready for this yet. However, I feel fairly confident in my riding skills so far.

So, my question is, is this just my "I'm young and invincible" feeling (which I don't believe I have) or is it possible that I've actually caught on quickly enough to feel comfortable with my 50 mile round trip commute?

I feel like I've made some good habits: I almost always flash my brakes before I stop (only time I don't is when I don't have time to) and when I'm stopped I always watch my mirrors and flash my brakes as someone approaches from behind. So far I haven't had any issues with people approaching too quickly.