Bluesky looks decent so far. It looks and feels like Twitter, but without the nazis, bros and trolls.
I wouldn't call it 'left-leaning'. Adam Kinzinger, a moderate conservative, said he hopes it will be a platform for both left- and right-wing views. Remember there's a big difference between conservatives and fascists (which the fascists want us all to forget).
Twitter is a toilet. There is no longer any more reason for anyone to have an account on Twitter than there is to have an account on Gab or Parler.