Create a Conda environment
conda create -n py38 python=3.8
Activate the environment
conda activate py38
Install ipykernel
pip install --user ipykernel
Add the envrionment to Jupyter
python -m ipykernel install --user --name=py38
To remove the conda environment
conda env remove -n py38
To remove the conda environment from Jupyter
jupyter kernelspec uninstall py38