LF players to farm a few chests

Hey, so due to work I can only play pvp on LoL once every 3 weeks as I work in a very remote location and only have access to a less than reliable .5MB satellite connection. Basically at work I only play one game vs bots at night for a win of the day. When I am at home I am a support main, but the with the new chest system I cannot win a chest twice on the same champion.

Since I have already won a chest on my support champions + the few other champions I play as I am finding it very difficult to get chests this month. Since I only pvp a few days a month not only am I rusty from the long break, I am also now being forced to play champions/roles I almost never play. (I would estimate that 70-75% of my pvp exp is as support) .

I have been told by multiple higher ranked players I have played with in the past that my support play is mid-gold, but since I have little exp at other roles I am probably around bronze 5 at them. This means when I have to play another role I usually just end up losing hard because I can't cs well, or do well in teamfights since I still try to play like a support... meaning I do no damage then die alot or let a low hp enemy get away because of habitually not wanting to ks.

Any help with coaching or just people to play with to help me get a few chests this weekend would be appreciated.