Welcome! Yes, definitely jump right in and go get a small boston butt. There's a ton of threads in here on how to do one very easily, and you'll be a superhero around the house when you serve the results.
BTW, you'll see your particular smoker referred to in the boards as an "ECB" which stands for "El Cheapo Brinkmann". Certainly not derogatory, as this is probably the single most popular smoker around. Everyone's got one or had one at some time in their smoking career. It's an awesome place to start. About the time you get the hang of using it though, you'll be wanting a little more "real estate" and you will start eyeing the bigger ones (fondly... longingly) when you walk through Home Depot. It's just a natural progression, and Dutch or DeeJayDebi will have a talk with you about the "tips" and the "flats" when that happens. :)
As with all the new guys we see around here, I'm impressed with 1) your enthusiasm for the art, and 2) your desire to get the most out of the experience, which has led you to 3) a very wise choice in you choice of internet-based smoking/bbq research sites.
Seriously, this forum is packed with info on anything you could ever dream of putting in your smoker, and some of the folks here have been doing this for a looooooong time. I personally am certainly not a master, but probably now an acolyte of the arts. I've been grilling and frying for a long time, but I got my smoker at the beginning of the summer and have been using it about every weekend doing *something* on it. Doesn't have to be huge or involved, but I've found that that the results that come out of my smoker easily trump anything that has come from my grill.
Do some searches on the boston butt, "abt", and "fatty" and you'll be walking the walk and talking the talk in no time.
Have fun, and don't forget to post more pics - you got off to a good start there with the shot of your ECB!