How to Port-Forward a Minecraft Server?

Okay. I have an hp laptop with mine craft, and i have set up a server on it. I can connect to the server no problem, but i want my friends to connect as well.

-My parents are divorced so i'm going between 2 houses every other week. I want my server to be consistent so i don't have to constantly change it (Dynamic DNS)

-One of the houses has a mobile hot spot instead of a router, i'm not sure if that would make a difference or not (Verizon)

-I'm new to this server stuff so please make it very simple and step by step.

You're gonna need to have the server at 1 place only, otherwise you'll have to move the server back and forth and change the ip.

http://www.wikihow.com/Set-Up-Port-Forwarding-on-a-Router