Despatching is more of a long term career than simply giving it a year - you won't find an employer who will let you become a full despatcher within 12 months.
If you want to fly, I'd go and do that if you can afford it or try and find work in Ops at a commercial school where you can get reduced rates.
As for your CV, when you're applying for a flying job it's just that, the flying, that counts - honestly not the background "padding".
You might be able to, if you've got the contacts from your work ex, get an assistant job with BA at ABZ.
I might know of a vacancy up there in pax handling shortly if you're interested.