Good luck bucko, yeah for a while i guess they'll probably keep you at the side of the road talking about the car, but if you get someone quite decent i'd guess they won't keep you at the side of the road all too long just talking, theres not really all that much to go over to be fair.
Clutch control might take abit of learning if youve never gained that skill before, but on average i'd have said after 40mins to an hour most people start to get the hang of it quite well.
If you can afford 2 lessons a week, i'd say go for it from the start, you'll progress much better, doing just 1 a week has big gaps, and when your first starting, if you can fit 2 or 3 hours in a week you'll probably progress on the first stage much better and faster, thats just my opinion though.
I guess i was lucky, when i first started driving i drove my dads car and he added me on his insurance as a learner driver, so i got a good bit of practice and knowledge before i took a few professional lessons to finish up.
Good luck anyway mate, i'm sure you'll enjoy it.
