How Do I Add Pop Up Text Boxes?

Im a newbie,coding is not my forte. Im sure the answer is in front of me but cant find it.

My VR tours are completely CG, and I need to add text info boxes that pop up when you select an object. Just a simple box with a few lines of text and an external link in some cases.

I dont know which plug in to use. I recall a Lear jet page with an example but cant find that.

Thanks for the help.