Oh well I guess I'll type it out for you-_- lol jk
#1- Open your command line. You can do that buy going to your start menu and typing cmd.
#2- After that type in the command line: ipconfig
#3- Find in that long list of stuff- default gateway and I think the IP4 (correct me if I'm wrong)
#3- Open your Internet browser, and in the address bar, type your default gateway address. It will always start with this-192.168.1.[last number here]
#4- A pop-up will appear asking you for a username and password. I know the linksys username is- admin and the password is- admin . If you don't know your password, just search "default router password for [your router here]"
#5- After you get into your router "page" look for a tab with a title of "Port Forwarding" or something about gaming.
#6- After you get there look for a line to open a port. It should say "Name" or "Application," which is what you identify the port as. It will also say "start" and "End" which you should type "25565" in both. Then it will say something about protocol, and just leave it on both. The ip address is your ip4 address that you saw with your default gateway, so just type that in there. After that enable it

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Hope I helped! Lol