What should I do?
Hello, I started playing League of Legends last week and I had never played a MOBA before. At first I didn't know which champion to choose but I've come to really like playing Caitlyn. I practiced against bots a lot of time and tried PvP with my friends a few time. Today I went on a game with one of my friend but someone called adc first. So I asked which champion I should pick and explained to them that I rarely played someone else so they told me to pick a support like Soraka or Sona but I don't have these champions. So I didn't know who to choose and since I didn't want to play with a random champion I just picked Caitlyn again. The first one to have called ad said that if I took his cs he would intentionally feed. So as the game started I was a little bit stressed because I rarely played in PvP so I forgot to buy my first item and started to go to my lane.
I got pinged multiple times by a master yi who reminded me to buy an item so I went back, bought an item and apologized via chat saying that I was new and sorry to ruin his game because of that. I don't remember exactly what he replied but it was in all caps and negative. He kept saying negative stuff targeted towards me so my friend told me to /mute all. I went to bot lane with draven(the one who had called adc before me) and just attacked the other champions, avoiding to take his minion kills. I did the best I could to help him but got 0/7/2 through the entire game. We won the game but after the game, master yi said in the chat "look at caitlyn stats" or something like that. I replied stating again that I was new but he kept going on so I didn't reply much after that. He looked at my match history and mocked me for having an AI game with 6 deaths(one player was afk and I had no support) and he said that all I was doing was feeding the enemy team with Caitlyn. I just said "ok" and left.
What should I do? Should I play other champions than Caitlyn? What did he mean by "all you do is feed" and what should I do to avoid angering my teammates?