Tymna/Jeska advice

So I’m trying to get into CEDH. But I’m having trouble trying to decide on when the deck wants to attempt a win. It’s not super fast like a K’rrik deck or Rog/Silas. Is turn 4 or 5 too slow or just right?

I’m asking that question because I’m also trying to practice mulligans and see what kind of hands are keepable. Whether I should be looking for hands with combo lines in mind+ tutors are what you’re aiming for, or if just a couple tymna attackers with a turn 1 or 2 tymna is good enough to dig. Early game is kinda what I’m struggling to wrap my head around really. Once I can find a line I can usually goldfish it to the end point, but just trying to decide what opening hands are good transitions into mid/late game isn’t really sticking.