If I want to upload a torrent freshly created by me to different sites. How should I go about doing it? Will I have to create the torrent separately for every site or can I use one torrent to upload to all the sites? The torrent is not there on either of the sites.
Also Is the method for uploading torrents same or different for public and private trackers?

Normally when you create a torrent you have to use a specific trackerlink generated by the tracker you want to upload to. These are all individual and will only work for that specific tracker. So you will have to create a torrent.file for every tracker (if they are private) you want to upload to.
There should also be a guide for these on most trackers, try taking a look at these

Thanks for clarifying
Cheers

If you want to upload a torrent to different private trackers, you need to create a torrent for each of the trackers each.
This is because your tracker URL is different across trackers. The announce URL usually consists of the tracker domain and your personal passkey.
Tracker announce URL example: http://yourtracker.com/abc123defg4567h/announce.

If you want to upload a public torrent across multiple sites, you can create one single torrent file and upload that. Just include some public trackers or enable DHT & peer exchange and you don't have to use trackers.

If you have any more questions, feel free to ask.

That was most helpful and clarifying, also thanks for the encouraging words.

Cheers

The problem is not that easy, it may be a very serious one. Don't try to upload the same torrent if you don't understand what I say below: (if you create a new torrent for each upload with a different client or piece size, don't worry! because those torrents will have different hash)

When you add a tracker announce to a torrent, its torrent hash (hash record) will not change and if you upload that torrent to some trackers, say Gazelle trackers for example, and you download the torrent, you will see that the hash records of those downloaded torrents are still the same. You can't seed the same hash torrents. Don't try to add different trackers' announce into a torrent hash.

But on Nexusphp-based trackers, their systems will change the hash of the uploaded torrent by adding their source value, downloaded torrents won't have the same hash. You can keep cross-seeding by adding those downloaded torrent into your client. (no conflict thanks to different hash).

That also means if you download a torrent from any tracker and upload it to a Gazelle-based tracker, remember to change the hash of that torrent.

Btw, you can change the hash of a torrent manually.

Tips: check carefully before uploading a torrent to several trackers, especially when you upload a torrent to a Gazelle-based tracker. So that you will not harm yourself.

Take care !

That adds more to my knowledge.
Much appreciated.

Thanks & Cheers