Scripts can be written to prompt for information and then you can use select or other methods to determine what was entered by a user. It depends whether you're using BASH or some other scripting language to determine what the exact syntax would be.
Here are some BASH references:
Bash Guide for Beginners
Advanced Bash Scripting Guide
Bash Scripting for Dummies and Geniuses
What you should do is start a script, try some choices to get things going and then post further questions when you get stuck. The way the forum best works is if someone puts forth honest attempts at doing something, then they usually can get all the help they ask for. Remember that forum posters are doing this on their own time, not for pay, not as part of their job or anything. Another thing to consider is what you mentioned, that you are new to writing scripts. People are not here to write scripts for you, if you wish to have someone write a script for you then the forum is the incorrect place to visit for that kind of assistance. If you've never written any script before, then you should read the beginner's guide and get familiar with writing scripts in the first place, there are examples. This way when you do try something and post it, and people then respond with suggestions, you'll be able to cope with understanding things.
Also not sure what you mean by wanting to use pop-ups. Whether that's a requirement or if you just want a banner of information to be sent like people see when they login to systems sometimes.
