Help with creative mode cheat?

I downloaded Minecraft a few days ago and can't switch from survival mode to creative mode. Have already tried different "commands", which one do I have to use in the latest version

/ gamemode survival

If that doesn't work, then you did that in the preferences. You can't change that now

The only thing you can do is:
You open the world for LAN (that's a setting) and there you can set whether cheats should be activated or not.

But you can

I've already tried it, only "Unknown command"

Try to share the world in the LAN and allow cheats on.

if you have created the world without allowing cheats beforehand, you have to share the world in the LAN whenever you want to use a command

Ok then you do the following:

Go to the desktop and press the "Windows key" + R.

Then enter% appdata% in the window and open "Minecraft."

Then go to "saves"> to your saved world> "level.dat"> data (you may have to open it with Notepad or Word).

Then you look for the word "allowCommands: 0"

You make a 1 out of 0 and save it

Because you didn't use https://www.google.com…

#GoogleIsYour (Spy) Friend \ o /

And you enter it 100% correctly? The first time I played on a server I misspelled / warp every time…

It may be that your commands are in German… You can still go to the settings of your world and it will change if everything does not deceive me! P.S. Java or Win10 version or pe?