tips to improve?

So I've been playing for 2 months now. I'm in Bronze 3 and I'm so bad, I get rekt every game I play. Then of course because it's the bronze division my team gets mad at me for feeding and tells me not to play ranked if I'm new to the game. So for now I've been sticking to blind pick and I don't really know what to do. Should I stick to normals or would ranked be good to help me improve? I don't really like blind pick since I'll sometimes miss the role I want (I'm more or less a one-trick) and often there will be that one feeder on my team. So what can I do to get better? Am I expecting too much of myself considering the amount of time I've been playing? Even in normals every time I'm against a Yasuo or Orianna mid I get rekt like a scrub lol.
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