Most high elo players are pretty busy, look up cardboardowl, he's willing to help out and I believe he has a chat room.
If you're gold you probably better than alot of people on the forums, including me. I'm about 1200.
if you have specific questions, I'd love to help you out, but you're looking for alot of free platinum level help, and that's not gonna be easy to find.
Executioner ken has a thread he always replies to. help thread from 1800's.
He's 2k elo right now.
Other than that, good luck on hitting plat, I just wanna hit gold.