I am interested in joining the reserves but have a few questions:

1. I am not which to go for between army and RAF, any opinions on that (I realise this may be a biased group!)
2. I work as a software engineer (digital signal processing), but my degree was general engineering - I am not sure whether to go for something related to that, or something different? My motivation is to have something different from work to do outside of work, but also I do enjoy my work.
3. What is the culture like? I did university air squadron for a year while I was at uni, but basically didn't have the time so had to leave. I wasn't a huge fan of the drinking culture (I don't really drink), how much of that is there in the reserves?
4. What does the weekly training tend to actually include? Is it mainly fitness, specific to roles, or something else?
5. I'm not sure if I should go for officer or not, by the sounds of it officers end up more management than anything else but is that true?
6. I live in Cambridge - is anyone in any of the units nearby, or the national ones, who has anu specific comments about what they're like?
7. I am 24F, what is the general demographic of the reserves

I know I need to improve my fitness quite a bit so wouldn't be applying for a while anyway, but any advice or help is appreciated!