installmatlab r2018a in wsl

I have wsl2 and I check the version of WSL each is set to by entering the command: wsl -l -v in PowerShell and I have

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PS C:\Users\Daren> wsl -l -v

NAME STATE VERSION

* Ubuntu-16.04 Running 2

PS C:\Users\Daren>

but when i run the following commands in ubuntu terminal

export DISPLAY=:0

export LIBGL_ALWAYS_INDIRECT=1

startlxde ( main command to run the desktop)

i have error

mkdir: cannot create directory ‘/home/daren/.cache’: Permission denied

-bash: /home/daren/.cache/wslu/integration: Permission denied

daren@DESKTOP-SMROJT0:~$ sudo -s

[sudo] password for daren:

root@DESKTOP-SMROJT0:~# export DISPLAY=:0

root@DESKTOP-SMROJT0:~# export LIBGL_ALWAYS_INDIRECT=1

root@DESKTOP-SMROJT0:~# startlxde

Agent pid 555

** Message: main.vala:99: Session is LXDE

** Message: main.vala:100: DE is LXDE

(lxsession:553): Gtk-WARNING **: cannot open display: :0

root@DESKTOP-SMROJT0:~#

and I can not see the lxde desktop

please help me to install wsl2 and desktop (GUI) in WSL and how to install matlab r2018a in wsl

[Mahmod Karndash]

what is meaning this

mkdir: cannot create directory ‘/home/daren/.cache’: Permission denied

-bash: /home/daren/.cache/wslu/integration: Permission denied