How to create a link i first and second Heading

I am using the quirrel Theme. How do I insert a link in the text in first and second Heading?

 

Hey janfrost,

Please follow the screenshot given below.


Thanks,
Praveen

 

Thanks for the answer, but as you see on the prt sc I do not have the "Theme editor".

 

Hey janfrost,

Please install a plugin "WP-editor" in your dashboard.

Thanks,
Praveen

 

Thanks - from a real web amateur