My bike arrived today and I've been going through some quite streets near my home, but I need a little help with gear changes. I can cycle up into higher gears quite confidently, but the bike feels a bit shakey when I'm going into back down into lower gears. What tips do you have for smoother gear changes? Also what tips are there for taking off in first? I am stalling the bike a lot, and it's lucky that I have a tinted visor so car drivers can't see my red face. I also dropped my bike when I found out how heavy it was when I stalled at the top of a hill.