I'm currently doing Electronics GCSE and the coursework doesn't take that long to be honest, I just spent too long talking:/ The real problem with it is the exam, literally the hardest subject I have ever done, my course work is at a high B or A grade and I did a practice paper and got an F and I'm supposedly the best in my class of 30.
It's a really fun subject though and I don't regret taking it at all but it is a really difficult subject so make sure you'll have a good teacher and start revising as soon as possible, we're doing all our course work first with minimal revision and now it's 2 months till the exam and I am screeewed
BTW I have friends who take Geography and many of them say its really boring but if it's a subject you enjoy already then I suppose you won't think that