Please help

When I hit 30 I was so happy because I though I was gonna play some awesome ranked and I was gonna get diamond fast! Turns out ranked is not a wonderland. I tried to get to silver, got to the test, failed 2 times and I was demoted to bronze 2. Never played a ranked game again... Then I started to watch ALOT and I mean a lot of pro LoL gamers and I do really well now. I mean I noticed the diference between my old games and the games now. The problem is that I'm too afraid to play ranked ever since the deranged to bronze 2 :( I'm afraid I'll end up in bronze 5 like most of my friends. -_- So now I need tips or advice on when should I begin my ranked games again. Plz