ok so first you need Forge here is a link to it

https://files.minecraftforge.net/

ok so downlowd the installer . Ok Great you got forge now to set it up . So your going to need to say yes to every thing and to da you did it . Ok now for the next part its to get MCreater here is a link

https://mcreator.pylo.co/download/167

ok so if you got windows do the pylo and pick the bits you got . And now of cores say thing as Forge but at the end click the close button in the bottom .

Ok so first open the This PC then open

Local Disk (C:) now open Pylo then open the Mcreater folder it will have numbers at the end and then Mcreater app thing and it will load after it opens for like 30 or more mins ;(  . And then you dont have to have account so click skip if you want LOL .