Don't be afraid if things seem difficult in the beginning. That's only the initial impression. The important thing is not to retreat; you have to master yourself.
The food in the House of Commons is fairly good. The cafe in Portcullis House is really very high quality, and you also have a choice of eating in the more traditional restaurants, the Churchill Room or the Members' Dining Room. I don't often eat in them, though, as I'm usually on the run.