Keep an eye out for Old Toons World, it's a private tracker that may be what you're looking for. It's currently closed however, but it opens registrations sometimes.
Probably someone who comes in and downloads a bunch of files before disappearing and never seeding.
I dunno about here (it's probably more relaxed) but on reddit, asking for invitations was frowned upon. You might see if you can find stuff on YouTube and then download it using one of the YouTube download tools. I also struggled to find kids content outside of Paw Patrol as I don't think there is much of a market for it. I had Muppet Babies permaseedimg from RARBG to help others out but that tracker is gone now and all the torrents are dead.
I'd look into Sonarr/Radarr in combination with Jackett (mentioned above)
Jackett is your search engine backend.
Within Sonarr/Radarr you add Jackett as your search Index (don't know the correct wording sry)
Been using this for quite some time and it works pretty much flawless.
Jackett still requires you to add your torrent sites like TPB, TorrentLeech or TorrentGalaxy, but in my experience it's a one time setup thing.
Honestly it makes life much more comfortable compared to manual searches on a single tracker.