Why dont' we make a new heart system (we'll call it green hearts) instead of unranked games? it's to help out the new players get their feet wet while also giving an incentive for the more experienced players to join the game (since if you win it will add to your score and winrate).
New accounts can immediately start playing green hearts which they receive 5 only every day until they feel comfortable playing the other hearts. I'm sure there are plenty of people who want to help new players not get lost and this will in turn help those help the ones that need help. We could limit the setups valid to play for those kind of hearts to something simple like classic. once they hit a certain point threshold they can start playing red heart games but they can still play green if they want. THis'll make it obvious which table has players who want help and the people willing to help will join that table. What do you think?