racing slowly?

I hate that I don't have enough time during the week to blog more often. You are going to have to trust me on this - I have some really profound and inspiring thoughts during the week and, well, you just have to miss out because of my lack of time. Pity.
Anyway, I am finding it harder and harder to eat really well on the weekend. During the week, I am structured - from my breakfast protein shake, to the time I drink my first 32 oz bottle of water or crystal light, to whatever I am wolfing down for dinner (on the run, of course). If I can control my snacking at night once I get home from work, I am good to go. But, the weekends are so different. We are frequently out during meal times, and unless I have the foresight to bring something, (which, I do on occasion) I am finding myself eating something out. Usually, even the best choice out is higher in fat and calories than I would like. My eating out skills really need work. Actually, my weekend eating schedule is what needs work. I need to plan it like I plan the other 5 days a week. This is a new goal.
I can't remember if I have mentioned it already, but I think it bears repeating. I am in the "220's" (ok, 227). This is the lowest I remember being in my adult life. I would say I have between 40-50 lbs to go. This is obviously going to take a while. I find even if my eating is "perfect" (whatever THAT means) I don't seem to drop any faster. I know that when I start exercising again (read: when I have more time (ie: When UNH ends for the semester)) that is will move off a little faster. One can dream.
I have had a passing thought about training for a 5K. I have been thinking about it for a few months, and then my bro mentioned he was doing one. That was quite a coincidence. My fear in this whole thing, (ok, ONE of my fears) is that I am totally fooling myself to think a fatty like me could run AT ALL, never mind 3.whatever miles in a RACE. Plus, I don't know how to train for anything athletic. I don't know. I feel like doing it would prove... um, I dunno. Prove something. To myself? To others? Meh. I have no idea. What can I say - I'm complex (read: insane)
If anyone has tips on a fatty running a race. Please feel free to share.