Expandable Text, Drop-down List When You Rollover/Hover Over Text?

Hi,

I know my way around WordPress OK but I am quite the novice when it comes to codes, so I need some guidance if anyone has some advice.

I want to create an expandable drop-down (or pop-out) list of text when you hover over certain lines of text. I need a code, not a plugin (wish I would have known you can’t use plugins when you host with WordPress BEFORE I went through setting it up).

I was able to figure out the simple hover text option but I dislike how small the text it, the fact that the box disappears after a few seconds and if possible I would like it populate into the page itself.

Something similar to this site’s (https://www.rkcap.com/test-exp1), except the curser would need to turn into a “hand” over the blue arrows. Or even the way this site’s (https://www.assistancemagnifique.com/services/index.php) rollover list operates.

Any suggestions?? Thank you in advance!