edit README with env instructions

Author: Kathleen Chen

Diff for: README.md

@@ -14,7 +14,7 @@ We also provide information and instructions for [how to train the Sei deep lear
 
 ### Requirements
 
-Sei requires Python 3.6+ and Python packages PyTorch (>=1.0), Selene (>=0.5.0), and `docopt`. You can follow PyTorch installation steps [here](https://pytorch.org/get-started/locally/) and Selene installation steps [here](https://github.com/FunctionLab/selene). Install `docopt` with pip or conda (e.g. `conda install docopt`)
+Please create a new Anaconda environment specifically for running Sei via Selene. Sei requires Python 3.6+ and Python packages PyTorch (>=1.0), Selene (>=0.5.0), and `docopt`. You can follow PyTorch installation steps [here](https://pytorch.org/get-started/locally/) and Selene installation steps [here](https://github.com/FunctionLab/selene). Install `docopt` with pip or conda (e.g. `conda install docopt`)
 
 ### Setup