Help Required Please

I'm sorry if some of this has been asked before, and if it is long winded, but I have managed to get an Ex-BRU flight to SFO next year (thanks to the advice received on here) and as its my first I have a few questions. We are flying to Brussels the day before from BHX so that we can spend the day and explore, and so we aren't leaving it too tight for getting the flight in the morning. We have a BA CE flight to LHR and then have to go to T3 from T5 to get the Virgin Flight (1st ever in Upper Class!!!). We have 3 hours 50 minutes between flights. And now the questions. Does anyone have any tips for things to do in Brussels? Will my luggage be checked through as I am on one ticket for both flights? I asked BA and their answer confused me. In one breath they said no and in another possibly!!! I understand I get access to the Clubhouse, but having seen the TV programme on Tuesday I am slightly wary about dress code for access. Are there any major no nos for the Clubhouse? Does anyone have any recommendations for things I should do whilst I'm in there?
I have booked 10A and 11A on the A340-600 which is being listed as the aircraft for VS19, but again, are there any tips about the flight. I'm heading for the bar and my husband wants the bed as he usually sleeps for the first couple of hours.
I am early asking this, but I'm a planner who won't settle until everything is in place, and only then will I relax and switch off. Im also really excited about my first Upper Class flight and I'm becoming worried that I will never want to turn right again. Thanks for any help/advice/tips that you are able to provide.

I have booked 10A and 11A on the A340-600 which is being listed as the aircraft for VS19, but again, are there any tips about the flight. I'm heading for the bar and my husband wants the bed as he usually sleeps for the first couple of hours.
I am early asking this, but I'm a planner who won't settle until everything is in place, and only then will I relax and switch off. Im also really excited about my first Upper Class flight and I'm becoming worried that I will never want to turn right again. Thanks for any help/advice/tips that you are able to provide.

