How do I improve on other lanes?
I main support, and usually I can get my pick as a support role. Recently I've been getting into games though where somebody else wants support, so I'm like "Okay, I can fill in jg?" But then somebody else wants Jungle. In the few games that I opt to let somebody else get support with no fuss, I end up taking a role that I have almost no experience with and very little knowledge about (mainly ADC or TOP). I gladly fill in the hopes it'll keep the team together and working better, but then I don't do as well and I can't carry my fair share of the work as a team-player.
What are some good pointers for playing Top? For ADC? I still want to main support, because that's the mindset that I feel most at home in, but I don't want to hold my team back when I fill a role I'm not as good in.