Install miniconda according to the instructions for your OS
Create an environment
conda create -n myenv python~=3.8.0 matplotlib jupyter opencv
conda activate myenv
Install CUDA / cuDNN and required libraries:
conda install -c conda-forge cudatoolkit~=11.0.0 cudnn~=8.0.0
pip install chainer~=7.0 cupy_cuda110~=7.0 chainercv~=0.13.0
pip install cvmodelz pyaml tabulate tqdm