I'm only silver 5, but this might help.
Tip 1:
There's an awesome site called Wardscore. It's telling me that you ward above...18% of players. As a support main, this is an issue. My wardscore is 87%, and honestly much of that is warding dragon before trying it. However, here's the catch on "warding dragon":
One ward doesn't cut it. 4 of the little bastards do. From blue side, drop a pink in the spot brush, sweep dragon and clear a bit of their vision, ward the bush near the river entrance, ward near their blue, and ward either that bush back in their jungle near the wolf camp, or the brush separating mid lane from river if the other ward is unsafe to try. You have to keep dragon timer by using tab and have these in place a minimum of 45 seconds in advance: even bronze now keeps drag timer, but they rarely prepare properly. with the huge importance placed on dragon fights in everything below like silver 1, you'll have near perfect vision in almost every meaningful teamfight before like 35 minutes. that alone should be worth nearly a division with some practice. your experience with vision gained just from watching a few fights develop like this will sharpen your instincts for more fluid warding later.
Tip 2:
that's too many mid champs. Kayle is a bit underpowered unfortunately, and I say this as someone who loves her. while all of your mid champs are good, I'd cut the options down to LeBlanc, Cho, and Sona. Sona only because she's your main, and that specialty will pay off with time. LeBlanc has a bit of a fear factor to her, lots of lower level players are heavily intimidated by her. Cho is generally tough to deal with because peel and kiting are not prevalent in lower levels.
Also, I would personally swap Sivir for Ashe. If you want a utility ADC, that's fine, but comparing Ashe to Sivir is like Leona to Bard: the rest of your team has much clearer indications of what you want them to do when you use your moves.
Tip 3:
As much as it might sound strange, you might have to play worse to get better. I have this issue myself: I'm not so much shy as I am objective focused, but there's just not much a soraka can do when mid and top ping the bottom outer turret, then dive midlane inner while zac is getting blue buff and adc wants wolves. So....try to be where the random action is, aka the midlane dive, and just try to make a pointless fight at least come out in your own favor. You'll probably die more, but a bad plan followed well is better than a good plan everyone's ignoring.
Tip 4:
wave management. While this is usually something you wouldn't see anyone below bronze one or two even knowing about, and as a support you'd often get yelled at for even trying, there is one easymode to it:
The Banner of Command.
Banner a cannon minion going top, then ping the shit out of dragon and start warding. faff around with all ten players there for a few minutes, and then 9 of them will report a bug when it says the dead sona destroyed a tower from halfway across the map.
TLDR: there are battles you can win by default in the lowest of bronze just by playing them at all. win there and gather that momentum.
support. I always played Sona constantly, whenever I can.
to get places. She had a lot more power to help carry a team.
you know EXACTLY what I'm talking about), you'll do just fine. A lot of adc's I've seen don't know how to position well, and never pay attention to the map and/or buy wards or use that damn trinket.
