After creating a bot with botfather, you can install one of many available plugins to your wordpress blog for quick and easy integration. You can also display the group and channel on your websites to encourage people to join.
The plugins allow you to auto-post from your website, and don't forget, a hosted wordpress allows you put any URL as the target of your link - so you can use a separate installation, and use that to broadcast, if you don't want wordpress on your front page. The external URL pointing to your real site will also be in the RSS feed of the site - so you can create an RSS feed from any site, or list of URLs. And you can import a feed too, and then re-broadcast this on telegram.
As you see, the list of opportunities here is enormous - I could go on for hours.
As luck would have it, my main wordpress multisite has these features available to all users for free - and you can signup here to our newsletter, and read this blog post, to learn more about my system: https://imnews.me/telegram-integration-wordpress/
-Mark