Fair warning, it has a lot of Trump supporters at the moment. The owner has repeatedly stated it is open to all and it would really be nice to have more from the center and left join. I joined it in support of free speech. It does allow you to self-censor, however, so you can block individuals, topics and language from your feed.
Everyone gets in. It is not instantaneous because it was a small start up that went live while still in beta, due to the large number of Twitter bans, I believe. When they did, they were overwhelmed with the number of people signing up. TQ is there, btw.