Looking for Coaching

Okay, so I've been repeatedly in a winning and losing roller coaster for months; now I've lost eight games in a row (Ranked and Normal), and from the middle of Bronze 1 back to the middle of Bronze 2.

I'm going to limit my scope of ranked champs to Vi jg, Janna supp, Diana mid and Tristana ADC. SO currently intending to practice more in normals to get back into a good mindset (refer to http://boards.na.leagueoflegends.com/en/c/tips-tricks/ABneovZL-need-help-with-improving-mindset).

But I need better critical analysis than what I possess currently to point out what it is that I struggle in with those and other ROLES (never mind the champs); therefore I need someone with whom I can voicechat or Skype with to help me not only get back up but to mold my thought process into something that can consistently perform well enough to influence all but the trolliest snowball games. NOT for any fee, either :P Looking for Gold or higher, doesn't need proficiency in all of these areas.