Minecraft nether portals

Once you build a nether portal, and go to the nether, there should be nether fortresses in the nether , lol you have to find them though

And a nether portal, and a farm.

You can sync up nether portals in the Nether and the Overworld. Every block in the Nether is equal to 8 blocks in the Overworld. To sync them, write down your
X and
Z coordinates where you want your portal in the Overworld, then divide by 8 and build that portal in the Nether at those coordinates. The
Y coordinate doesn't matter so don't worry about it.

My son and I play a lot of split screen Minecraft. After going to the Nether 3-4 times the game started crashing when we tried to enter the portal. I mean total lockup of the whole xbox. Had to hard reboot. Tried lots of things from forums to fix it, nothing
was working. Finally put all our stuff in a chest and went out and poked spiders until they killed us both. Then we respawned and saved the game. And pow the portal works fine again! Have visted 15+ times with no problems. I think our original problem was
because we saved a game in the Nether or the portal was nuked by a Ghast while travelling, not sure. But it is fixed and we avoid saving it while in the Nether now.

I have the same problem and it stinks. I will try the thing with friends. Thank you