Unfortunately most public torrent indexers tend to restrict ability to upload so it’s not quite that straightforward.
There’s a few you can investigate, let us know how it goes.
1337x - Not sure what their registration requirements are, if any.
Angie Torrents - They seem to have registration/uploads, unsure of any requirements. (their website isn’t great, maybe check out the others before trying here) Might be down?
BitSearch - Mainly a torrent DHT crawler/indexer but they do offer the ability to add new torrents to their search index (both BitSearch and SolidTorrents)
Demonoid - I’m pretty sure registered users can upload there, keep an eye on when they open registration.
SolidTorrents - Mainly a torrent DHT crawler/indexer but they do offer the ability to add new torrents to their search index (both BitSearch and SolidTorrents)
Also note that many of the russian torrent forums do seem to allow registering & posting torrents but am unsure of their specific requirements. Also non-english. (ruTracker, Rutor, etc.)
EDIT: Added Ext
EDIT: Fixed SolidTorrents link, crossed out Angie Torrents for now