Ubuntu commands aren't working

My Ubuntu seems a bit weird. cd and mkdir work fine, but instructions other than ls and rm do not. I'm not sure what the problem is. Isn't there another way to initialize this path? I have solved the problem where the terminal was not working before, but this time the instruction was not executed and I was unable to proceed with my experiment.

(base) sohyeon@X11DAi-N:~$ ls
(base) sohyeon@X11DAi-N:~$ ls
(base) sohyeon@X11DAi-N:~$ ls
(base) sohyeon@X11DAi-N:~$ ls
(base) sohyeon@X11DAi-N:~$ mkdir bl
(base) sohyeon@X11DAi-N:~$ cd bl
(base) sohyeon@X11DAi-N:~/bl$ ls
(base) sohyeon@X11DAi-N:~/bl$ echo $PWD
/home/sohyeon/bl
(base) sohyeon@X11DAi-N:~/bl$ ^C
(base) sohyeon@X11DAi-N:~/bl$ ls -blah
(base) sohyeon@X11DAi-N:~/bl$

(base) sohyeon@X11DAi-N:~$ type -a ls
ls is aliased to `ls --color=auto'
ls is /usr/bin/ls
ls is /bin/ls

Check my folder capture image.

You've provided no Ubuntu product & release details; but if you perform a ls command (ie list files) in a directory which has no contents (no files or directories; not counting any hidden files/directories), no results are shown as there is nothing to show.

eg.

guiverc@d7050-ubu-lts:~$   mkdir bl
guiverc@d7050-ubu-lts:~$   cd bl
guiverc@d7050-ubu-lts:~/bl$   ls
guiverc@d7050-ubu-lts:~/bl$   echo $PWD
/home/guiverc/bl

I created a directory bl, then made in my present working directory ($PWD) with the cd command, then performed the list-directory contents (ls) in that empty directory, and it shows it was empty by the lack of results. This is expected.

To view all details in the directory; you can add options to the ls command (which will not show hidden files/directories by default), which on the newly created directory will be

guiverc@d7050-ubu-lts:~/bl$   ls -lah
total 32K
drwxrwxr-x  2 guiverc guiverc 4.0K Aug  7 11:49 .
drwxrwxr-x 62 guiverc guiverc  28K Aug  7 11:49 ..

ps: I don't need all of -lah, but my fingers typed when I wanted to add the -a to show all, as I prefer reading results in long (-l) format and in human format too (-h) thus my fingers translated my mental -a to -lah

My directory is actually empty (was only recently created), thus all mine contains is the pointers the system uses to 'walk the directory structure' which is what now show.