Shirley
The timescale for distance learning could be less than 18 months if you can put the time in. I've just done my first 8 in about 4 months and I'm hoping to do the next 6 in 4 or 5 months. I have been flying for a bit longer than you, which may help a little in some subjects.
I looked at Glasgow Nautical College but decided to go with Bristol and I am happy with my decision. Sat my exams at Glasgow mind you.
good luck whatever you decide.
gdn