As a new owner I can tell you, just let you Bp explore and settle in bit for a few days (2-3), then offer food, do not handle the day before feeding of for 36-48 hrs after feeding, or until the bulge goes away, I also suggest also to feed in enclosure, some owners prefer to feed in a separate enclosure but it isn't necessary, besides you shouldn't be handling him/her after they've eaten anyway as they could regurgitate which isn't good for them.

So far your Bp seems to be exhibiting normal behaviour. My Bp is 9 yrs old and rarely balls up, she's either S'd up or stretched out along 2 sides of the enclosure and likes to keep that S in the section you mentioned, it's not threatening, it just means they're are aware of your presence.