Congrats on your first brew. If the only mistake was coming up a little shy of 5 gallons, you are well on your way to actually being hooked. I started 8 months ago, with the plan to just do an extract kit once a month or so. I just kegged batches 8 and 9 of all grain over the weekend. Seems that whenever I take a couple of weeks off from brewing, it just leads to a multi-brew weekend. My waistline probably doesnt agree, but my friends and my mind think it's the best thing I've ever done. Welcome to the fun.