Can I climb the ladder as a support main?

I'm a really good midlaner but my two other roles, jungle and adc are questionable. I'm fairly decent at support but my problem is that I only play Soraka/Sona/Janna I'm Silver III, would it be possible to get to gold supporting as those three? If yes, what should I focus on most as a support? Lane winning? Peel? Thank's in advance!
Report as:
Offensive Spam Harassment Incorrect Board