python ImportError: No module named site

Question

I am very new to coding, I couldn't get pycharm to work (i kept getting an error saying "failed to create virtual environment") so i used this link

https://www.ianmaddaus.com/post/manage-multiple-versions-python-mac/

to uninstall all pythons except 2.7 in the bash profile (2 of them stayed) edit: this is what i did to delete all the versions of python except 2.7: i opened the bash profile, deleted all the versions of python - i did not delete version 2.7, even though there were 2 of the same version in the bash profile, because i heard mac needs python 2.7 to function and i didn't want to mess with that. then i typed in the terminal the following code:

sudo rm -rf '/Applications/Python 3.10'
sudo rm -rf /Library/Frameworks/Python.framework
sudo rm -rf /usr/local/bin/python
sudo rm -rf /usr/local/bin/python3

now when i try to run python from the terminal i get this error:

ImportError: No module named site

and when i try to run python3 from the terminal i get this error:

Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'

Current thread 0x0000000104dcce00 (most recent call first):
  <no Python frame>

when i try doing this:

unset PYTHONPATH
unset PYTHONHOME

they both work (both python and python3) but they start giving the errors above again when i try later

what did i do wrong?