When does Season 6 end? + Looking for mid elo smurf to duo with.

Iv been stalling for awhile to get into gold, plat / diamond.

My MMR is around Plat 5+, while I am in Silver 3 sadly. Gaining 30+ LP a win and losing next to nothing. But I still have like, Dynamic queue PTSD from my placements, about 6 of my games had some sort of sevear troll or intentional feeder since they got their champ banned, or I didn't give them mid or jungle. Other 2 loses would probably be from AFK's, and my 2 wins are from me carrying, resulting in a placement of Bronze 2 with a huge MMR difference, being Gold V MMR, and since, iv managed to climb to Silver 3, with only a few loses, but since I was bronze 2, I wasnt able to skip divisions into Silver V fast enough, so my MMR kept rising during B2,B1 and Promos into Silver V, then skipping into Silver 3. Winning a couple times, now at 56 LP.

tl;dr im scared to play ranked bc feeders in placements, and top laners who have 90 CS by 30 mins.

Wanting to know when Season 6 ends so I know when to hurry up and climb to Gold.