Just want to add that I get about 3 poos in the paddock, and then then about 4 or 5 in the stable, but it is difficult to count as it gets spread around, so I can sort of tell if it's the right amount iyswim?
Is there anything I should be doing / not doing?  Should I shut them in now for a period each day?
I keep mine in but I do know people who keep shetlands out all year round, with no problems.   
How often do you poo pick - do it every day for 10 mins or so best as a routine?
I poo pick every day, just so I can keep an eye on it lol.  I get a bit obsessive about poo! lol 
Also they don't seem to like me touching their legs so I haven't hoof picked yet - should I be more assertive?  Do you give them something to eat while you do that?
I was lucky with Dusty as she had seen it all before.  I do always do it when she is either eating from a hay net, or a bucket.  She now, actually, lifts her feet up for me to do it so she's well trained lol.  I do it twice a day - when I turn her out, and when I bring her in and if she's stabled, I do it in the morning and evening.  There is the odd occasion, I won't do it for some reason or another but don't think it will hurt her.  I jsut find it's a good time to check her feet.  
Find yourself a good farrier - mine has been a godsend.  I can text him any questions at all, and he will answer.  But then, he asks me daft questions about dogs lol.  
Dusty is my first pony so I was a novice as well but it's surprising how much you get into a routine.  It's when that routine changes, I start to panic lol, but always ask on here, as they have all been so lovely, and helpful.
Oh, I don't turn her out on frosty grass, but she has had laminitis.  She did have to wear a grazing muzzle for a short time after that and since then, we have been sooo careful about it and we have been laminitis free for nearly 2 years - touch wood!  I think having it so early on after getting her, has made me even more neurotic/careful about it.
It's certainly a very steep learnin curve, but a fun one at that!
Helen