I use automatic torrent management mode with qBittorrent for most things and set it to seed every torrent for 40 days (iirc). If I had unlimited storage space, I’d probably seed forever, but I found that 40 days works well for me.
Also, don’t use a Debrid service. These services just leech requested torrents and then instantly stop seeding (if they even upload during download, not sure). This is bad for torrent health on public trackers, and will quickly get you banned on private trackers.