I made it!
Finally clawed my way in Gold! 67% overall winrate and it took 61 games to climb from Silver 5 to Gold 5
As a Solo-only player as well :)
Yes, I'm aware Gold is still "low ELO", but it was my goal and I made it
EDIT: I ALSO UNLOCKED MY LAST CHAMPION TODAY! A good day indeed :) (It was Zed)