So i want to make my own distro. What do i need? And can 15 year old make own style distro?
What now i have is newest linux kernel from kernel.org i need a LXDE or some other light weight GUI. And small list of software.
What skills will i need?
Tnx for help.

Start from here: http://www.linuxfromscratch.org/lfs/

Tnx!

Maybe other ways to make distro? I have downloaded newest version of kernel and how to use it? Get all files in iso? Or something else?
I want some light weight GUI for it. It is in tar.xz file.. What is that? I know i can open it with winrar

No, there are no other ways. Just start reading there and don't be lazy!

winrar sounds like a windows application so you can't use it on linux as such, there is more to making a distro than just downloading and un-tarring the kernel sources, you have to build a complete bootable system to start off with, so as Bindestreck said start at the begining of the book from the link he gave you.

Building an LFS system is NOT creating a new distro, if by that you mean you want a distributable system that will work/install on a number of different machines, that will take a lot of time and effort and from you above posts you don't yet have the necessary basic knowledge so start small and work your way up.

If you run into a specific problem then feel free to ask for help but asking for help for some vague generalized question like "I want to build my own distro" wont get you very far.

Think of it this way...

LFS gives you the start of what you can use to create your own system. Things like build scripts, package managers, and repository synchronization tools then become your responsibility to keep packages up to date, resolve issues, and control revisions of builds to truly make the system your work.

Things like patches and security updates will need to be handled by you.

If you want a place to learn to do all this, use Slackware for a few years and get some experience under your belt, then go for LFS or your own distribution.