Ideally, the readme.md has already been created by the time l reach here or no ?

Depends, if you followed the tutorial precisely it should already have been created in the step "Create the repository 3.". You can use the ls command in the WSL terminal to see if it exists.

If not, where do I create the readme ?

In the base directory of the git repository you cloned from Github. You can do so with the command echo "blaaaa" > README.md (this will overwrite the file if it exists already).

In the WSL terminal or the vs code terminal ?

See I think this is your misunderstanding right here. The tutorial tells you to enter code ., where code means "start VS Code" and . means "in the current directory". You are supposed to then use the file explorer inside VS Code to select the README.md and modify it.

This may not work as intended in WSL. If you enter which code and there is no output it won't work. Is there any reason why you are using WSL instead of just installing git for Windows? It comes with a terminal emulator, so there should be no problem following the tutorial and you can eliminate WSL as a possible friction point.

wait WSL Terminal? so you're using the Windows Subsystem for Linux?

I think you're making this harder on yourself than you need to. It's like you're trying to use a saw to cut a piece of wood before knowing what wood even is.

I'll be honest with you, don't use VS code, you're not ready for it. All you need right now is quite literally a regular windows terminal and a basic IDE. notepad++ or sublime text. ONCE you've learned the basics you can go back to VS Code, that VS Code terminal is gonna mess you up.

A. make sure you have git installed just open your windows terminal and do winget install Git.Git

B. again in the regular terminal navigate to your repo you've created.

C. open notepad++ or sublime text or whatever basic IDE you picked and create a README.md and save in your repos directory.

D. back in your terminal do git add . make sure you have a space between add and .

E. then do git commit -m "initial README.md commit"

F. finally do git push and you're done. you can then check it with git status and it'll show there's nothing to commit, everythings up to date.

I think the tools were messing you up. I don't recommend VS Code for beginners, it messes them up. keep it simple for now.