YES I HAD THE SAME TROUBLE dont worry...
its easy just
put this into your internet browser "192.168.1.1"
then you have to figure out your password
mine was user: admin Pass: password
but somtimes it is different just search your router on Google and find the default user and pass
then after you sign in to your router on the left side of the page is a blue bar near the bottom you will see port "forwarding/port triggering"
select that then add a device and switch the connection type to UDP
and name your device anything you want and the in/out fields are suppose to have a important number in them i forgot hold on leme see if i can find... ahh got it put "19132" for both in and out and
the last feild put in your ip you can figure out your ip by going in you phone and looking at you router in the wifi settings
and then finaly just save the settings and make sure its running and make sure your device is connected to the router and play minecraft!