One can create a new dataset with 'datalad create [--description] PATH'.
The dataset is created empty

The command "datalad save [-m] PATH" saves the file
(modifications) to history. Note to self:
Always use informative, concise commit messages.

The command 'datalad clone URL/PATH [PATH]'
clones a dataset from e.g., a URL or a path.
If you clone a dataset into an existing
dataset (as a subdataset), remember to specify the
root of the superdataset with the '-d' option.