A butt or two is the easiest and most rewarding thing to cook. It's a right of passage for the first timer. You can cook it at 225 up to 300F without issue. It's truly the most forgiving BBQ you can do.
If you have family and need to entertain, grab 2 butts (shoulders) around 5lbs each. You can start them at 8am and be done for dinner cooking in the 200's. If they finish early, simply wrap them in foil and place in a cooler to hold them. You can get 4hrs of hold time easily without compromising the meat.
You can search for recipes and techniques here. I like a lot of pepper with a vinegar finishing sauce but your store bought pork BBQ sauce will be fine. Kids love simple ketchup.
Finally, use cheap white hamburger buns. They soak up the juice and don't overpower the meat.