I put the setspawn mod in the folder and i don't know what to do next

and also if you have any clue how to make the atum mod works for setseed I'm open, because it keeps generating random seed worlds even if I started generating a set seed before

For Setspawn - Edit setspawn.json in .minecraft\config

For Atum - Hold shift when you press the golden boots icon to edit the seed as well as a few other options.

Thank you!

Just one more thing, how do you edit the coordinates of the spawnpoint in setspawn.json?

I can see « “seeds” : [] », but nothing about coordinates

Each entry should look like this:

Just replace the seed with your seed, and the coordinates with acceptable ones. Make sure they end in .5 and are in a spawnable area.

    {
      "seed": "-6399266822892677026",
      "seed_name": "buried shipwreck",
      "x": -16.5,
      "z": 54.5
    },

I tried a lot of things and the game keeps crashing before i can enter the world

it looks like this in the setspawn.json :

{
  "enabled": true,
  "use_global_config": false,
  "seed": "8580201715969257660",
  "seed_name": "all wool",
  "x": -135.5,
  "z": 59.5
}

This is the correct format

{
  "enabled": true,
  "use_global_config": false,
  "seeds": [
    {
      "seed": "-6399266822892677026",
      "seed_name": "buried shipwreck",
      "x": -16.5,
      "z": 54.5
    }
  ]
}

It worked! Thank you!

I just beat the WR with that!