Create your own simple one-way nether portal to stay in the nether for all your nethery nether adventures!

This is a compact design that requires at least one cheat command but needs no mods.
/give (player) 90 1 "Portal Block"
However, the single portal block can be replaced by a full portal. The design would be less compact but achievable in survival.

Note: While bedrock was used in this tutorial it is not required for the mechanics to work.

If you yearn for the nether but not its horrors go check out the Lmea Overnether Texture Pack to safety bring the nether home to you!
www.planetminecraft.com/texture_pack/lmea-overnether-pack/