Clickable header in Minimous theme?

I’m using the minimous theme that I’ve customized myself to look and work the way I wanted, but now after 2 years I’m gonna give my site a small facelift. First struggle is how to make my header image clickable and linking back to my homepage, my question is, is there any “easy” way to get around this? I’ve seen all kinds of suggestions online how to modify the header.php, but is there any way this can be done in css directly?

You might have figured out by now I’m not a coding expert.
Thanks for any kind of help and feedback!