Well, there are a few tips I can give, but to be honest you picked a bad role to try to carry with. People will disagree with me, but it's the truth.
To be a successful support, you have to buy a support item, make sure that your carry doesn't die, and sometimes, secure kills, all while taking no minions. It's a hard job to begin with, but you also have to consider that you are heavily reliant on your carry. Not to mention warding. If you're in ranked, wards might as well not exist, because a lot of caries don't even look at the map, just as well, most people in bonze play locked screen. It isn't a huge problem, but can make things worse when you consider they don't check the map either.
If you want my advice, I'd say save being a support main for high silver (like, Silver 1, almost gold, high silver). You can't really win the game as an individual on support, which really limits the effect you can have on other lanes. Some games, when your carry is consistently good, you can sometimes get them fed enough to farm alone while you roam, but some adc's in bronze clearly should NOT be left alone under ANY CIRCUMSTANCES. If you find yourself popping devour to save your carry almost as soon as it's off cooldown, you just can't leave them alone, or they'll die.
If you want to help people like a support without cs'ing, you may want to pick up jungling. There are a lot of junglers that focus less on getting kills through sheer damage, and just locking champions down for your allies to wail on them until they die. If you like Tahm and Blitz, then you can probably still get away with jungling as Tahm. He gets super tanky, and dishes out both punishment and cc at the same time, making him pretty strong. With either a frozen mallet or a landed Q, he can stick to people and devour-loop them to death in the late game. You may just need to learn how and when to go HAM, and learn something about objective control.
Tahm is also good as a top laner, but top lane is another lane that's hard to impact the game with, just due to the sheer isolated nature of top lane. Teleport helps, but it's a major cooldown. What I can recommend is Blitz mid. AP Blitz has some pretty op ratios, and unprepared squishies who aren't used to blitz's shenanigans will definitely be caught off-guard by his burst, and cc combo. Lichbane is terrifying on him, which adds even more to the absolute terrifying nature of the godhand. Otherwise, Lux is another felixible pick that takes a lot from support roles and brings it to the mid lane. It sounds like you may play well with high utility mid mages, such as lulu, lux, blitz (if you want to go full carry-con-queso), and even Zyra is a a pretty strong mid laner that still can afford to team fight like a support. Galio may be worth a try as well, because he doubles as a tanky support champion as well.
Other than that, I guess I could tell you, as a support to ping when you see things about to go south and hope your carry listens, and take cs that your carry is obviously going to miss (i.e. if they're mid animation and about to miss the other cs; if they yell at you let them know why you did what you did, and if they don't understand mute them). Make sure you remind everyone to buy at least one pink ward, and remind your carry to use their trinket. It's basically all you can do. :/