Social icons & breadcrumbs bar

Hi,
I’d like to add some social icons to the grey bar that appears under my logo: https://macassar.fr/WordPress3/

If I understood well, I have to add some text under Theme Options > General Options > Social icons, is that right ?
Where do I find the text to add the following icons ?
– LinkedIn (with a link to our LinkedIn account)
– Email (with a link “mailto…”)
– Print this page
– Link to another WordPress blog

It would be even better if those icons could appear on the side like in your demo https://themes.ishyoboy.com/?theme=boldial-wp but I think for that you need to install some plugin ?

Thanks for your help ! (And thanks to use really simple words as I don’t know a thing about WordPress or coding :D)