Sending news to Telegram channel

Hello, I need help, especially a step by step one.
News is regularly published on my website, and I would like it to be automatically sent to a telegram channel when it is made public.
I created a bot, I added it to a channel, but further I don’t know what to do, also I didn’t find any information, or a step-by-step guide how I can do this.
Anyone willing to help a newbie?

Maybe this thread helps:

It contains a link to an article in russian with MODX plugin code.