If the channel is public, it will have the link as t.me/EXCELLENT — can you post it to social media sites, print on paper. Or get a tattoo with a QR code of a link on your forehead, for example.
You can also place your channel in different directories (e.g. in our).
Please do not send a link to your channel (or other unsolicited messages) to strangers. If they complain about spam, you will be blocked very quickly.