I've played support in ranked more than anything. Your first priority is to win lane. In bronze/sil (my experience), I've had the best results with being very aggressive early. Low elo bot laners can't deal with pressure. Just keep the river warded and watch for ganks.
You will not always have an adc that can handle your pressure lane. In this case your #1 goal is to not die in lane and keep your ad farming.
This is precisely how I play support every game. And 9 times out of 10 we win our lane. Problem comes later in the game when our carries don't know how to focus, kite or position in team fights to avoid being melted a second into the fight.
If they aren't focusing the right person, tell them who to focus. You are the support so more than likely you will be the one engaging. That means who you engage on is who they will focus so make sure you are making the right decisions.
I do this as well. For whatever reason, as a support, I feel like I have the responsibility of knowing where everyone is on the minimap, warding, peeling, engaging, making dragon calls etc... so the other can focus on what they do....damage.
I know it will even out in the end, and it's just teambuilder, but it's still frustrating when you can't get your team to communicate with you when you are offering advice, help and strategizing with your team.
I love that role. Just wish people would listen sometimes