There are open trackers on I2P e.g http://opentracker.skank.i2p/ and http://opentracker.dg2.i2p/ both trackers don't have a search interface though, so probably people won't find your torrents unless they are very popular. You can upload the torrents to http://tracker2.postman.i2p which has a good interface.
Doing so would help with the download speeds for other users.
P.S I've enever used XD. So I can't help you out there, but it seems like a very bare-bones torrent client. qbittorrent recently added support for it ~~but if you're running a headless server, XD doesn't seem like a bad option~~. Github says it has no DHT support? Not sure if that's the best option, but good luck with it.