I'm pretty sure the megathread lists a website that tracks signups though in my experience it's not as good as the subreddit. You really just have to watch that space. (Focus especially on checking daily through the winter months, in my experience lots of places open up around Christmas though around Christmas is pretty vague, some will open up around last week of or mid November, others early December, others in early January so it's a patience game). You can create an rss feed for the sub so get just the posts fetched for you when they occur.
TL is one of the best. If you need help filling some holes I'd strongly recommend the semi-private rutracker. You can sign-up using browser translation tools and then add it your search stack (it has jacket support) and search using English titles. It's surprising how many seeded BD remuxes you can find there, they even have stuff I haven't found on any other PT's below PTP level. As it's semi-private there are no real requirements for seeding or ratio though they do track that stuff on your account and give little badges for helping seed. Rutracker also as the other commenter mentioned is pretty strong on CD-rips and music. They're very weak on western TV though.
LST is really good. Strong requests and great bonuses system just for keeping seeds going. They have freeleech on open signup and there's a pool people can fill up to enable it routinely as well. Points can be traded for upload credit so even if you don't succeed in actually seeding you can maintain ratio. Be sure to check out their Christmas advent calendar (TL does this too) for free points, some people get lucky and get millions of points and you're sure to get thousands, probably tens of thousands just for checking in daily in December and that can easily boost you to enough credits to buy enough upload to get over a TB. Once established it's not at all a tough tracker though I'd still prefer TL over it if they have the same stuff because TL has a lower size threshold for automatic freeleech and a lower ratio req.
The AvistaZ network of sites can be pretty good for obscure content but they're stricter than I'd like as they require login every 60 days and download of a torrent every 3 months or you get banned which seems easy but if you're not using them for much it becomes a chore you have to maintain and if you're on multiple of these sites it applies independently. Cinemaz in particularly is good if you have tastes for arthouse, obscure, and foreign films that you're struggling to find elsewhere. It doesn't have mainstream releases though. AnimeZ is pretty good for anime though generally most stuff can be found on nyaa or other open sites. PrivateHD is fine, I find myself mostly finding stuff on TL and choosing it over their listings but occasionally they have a better version of something. Their old rules were better, you could go longer with some inactivity that was more realistic.
If you like old western cartoons then something like Oldtoons would be a great idea to try and get into. That or a general old content specializing tracker though I can't mention the one I'm familiar with by name as they prefer not to be talked about.
If you see hawke uno opening up I'd suggest joining them as well. More encode focused, heavy focus on HEVC but they have an awful lot of stuff from their internals including TAoE and HONE and lots of cross-seeding ability as most QxR stuff gets uploaded, no ratio, just points system and you get a bunch at the start, earn more by seeding, keeping a lot of stuff seeding and you'll never want for the ability to download or worry about running out.