Hi lust4live,
What WordPress theme and editor are you using right now? If you’re using commercial themes or plugins, I recommend reaching out to their support forums, so the theme/plugin developers and support community can help.
Additionally, you can use the HTML code below to add links. Just replace YOUR_LINK_URL with the URL you want to link, and Your Link Text with the text you want to display for the link.
<a href="YOUR_LINK_URL" target="_blank">Your Link Text</a>
Hope it helps!
Depending on your theme I think you might be able to put HTML code in there. So then you could do something like this:
Normal text <a href="https://ww.wp.xz.cn/support/topic/links-in-theme-optimiser/">linktext</a> more normal text
Replace the link between quotation marks “” with your own link.
I hope this helps. Good luck!