download python 3.9 from official python website
open command prompt and run the below:
python --version (confirm its 3.9, otherwise uninstall previous versions and install 3.9)
next run, one after the other
python -m venv venv
.\venv\Scripts\activate
pip install --upgrade setuptools
pip install --upgrade pip
pip install --upgrade wheel
pip install rasa (wait till its done)
(if you get execution policy error) Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass
rasa init
remember, fight it until it works , good luck