this is my current config

{
    "absoluteTimeScale": {
        "03": 0.1
    },
    "activity": [
        "input",
        "loot",
        "respawn",
        "chat",
        "wakeup"
    ],
    "afkMinutes": 5,
    "clanFirstOffline": false,
    "clanShare": false,
    "cooldownMinutes": 10,
    "damageScale": {
        "1": 0.2,
        "12": 0.8,
        "3": 0.35,
        "48": 1,
        "6": 0.5
    },
    "interimDamage": 0.0,
    "minMembers": 1,
    "playSound": false,
    "prefabs": [
        "door.hinged",
        "door.double.hinged",
        "window.bars",
        "floor.ladder.hatch",
        "floor.frame",
        "wall.frame",
        "shutter",
        "wall.external",
        "gates.external",
        "box",
        "locker"
    ],
    "showMessage": true,
    "sound": "assets/prefabs/weapon mods/silencers/effects/silencer_attach.fx.prefab",
    "VERSION": "0.3.6"
}​

I wanna make it so people for the first 48 hours offline dont get raided or just make it so when your not online ya cant be raided would be better but i dont understand this absolute time scale and how its set anyone able to assist?

Ignore the time scale. Change the damage scale to all 0s, like:

"damageScale": {
"1": 0.0,
"12": 0.0,
"3": 0.0,
"48": 0.0,
"6": 0.0
},​

With that the base is unprotected while online and for the first 15 minutes after you logoff. After the 15 minutes it will be 100% protected.
You could also change cooldownMinutes to 0 if you want. But I would leave afkMinutes at 5.