I’m new to manjaro and linux in general,
I somewhat know how to use debian but i saw that manjaro is user friendly and easy to use so Im trying it I dont like desktop environments like gnome, xfc but i do like pantheon and I saw this github for manjaro iso build but I don’t know what to do since tutorial is not that clear
Manjaro is not superior or inferior to any other Linux distribution, they all do the same. Manjaro has its own repositories, package manager, themes, software and custom Kernels.
Creating a customized Manjaro ISO is hard work - there is no shortcuts - there is no free meals - there is noone who will cook the ISO for you.
In the iso-profiles repo manjaro/gnome folder you find the Gnome cookbook
Search the repo for pantheon related packages.
Use the Arch wiki for Pantheon
Download a minimal Manjaro Gnome and create a VirtualBox VM
Download the elementary ISO and create a VirtualBox VM
Spin up the Gnome virtual machine
Spin up the Elementary desktop - then take it apart to see why it works the way it does.
In your Gnome VM sync the packages required to have a basic Pantheon desktop
Make notes - lots of notes - learn from your mistakes
Be prepared to do a lot of testing and experimenting