Insert Social Media Buttons inside of Price Table

Hi,
I’m trying to add some Social Media Buttons (like an email button and a phone button) to the Price Table (to one of it’s rows, or “features” as they are called). I’m actually using the Price Table for a kind of a About Us box, since I wasn’t sure how to create a “box” kind of widget myself (so I’m using Price Table which looks nice). So my question is: how do I add those buttons within a feature row? Or, if that’s not possible, how do I create my own box with looks of Price Table? I just like the style of Price Table so I’d like to use that. I’m also curious, how to insert certain widgets inside other widgets in general? (and I’m not talking about SiteOrigin Layout Builder thing, I know how to add widgets to that, obviously) I guess I’m interested in how to do that in a general case (or how to make my own widgets using styles of other widgets and them adding those to Layout Builder or whatever).