just search the net for the most op and skill needed champion ...

just search the net for the most op and skill needed champions , like say ... azir ? gp ? yasuo ? ryze ? riven ? etc and then buy them and go straight to ranked and try them out , dont waste time on normal , you will learn them as you go , sure u will ruin a few games in the process , but when did that ever stop u eh ?>

or if your short on ip and rp you can always go on the youtube or twitch and watch nightblue3 and see how he builds hes champions then go and try them out your self .. like say ap ww ? if it worked out for him its gonna work out for u right ?? ? the small factors like they are challenger and your silver 4 shouldnt make the smallest doubt in ur mind

god speed friend keep up the good work [zombie-nunu-bummed]