Hi Alex,
We’ve got some online resources that can help with the understanding of what’s in a basis set, and how to create one. See these videos and the last bit of the online practical.
As an alternative you can use a preexisting basis set without regenerating it via simulation. For example by following the same route in this thread FSL-MRS spec2nii philips dicom dimension issue - #5 by VerenaD, using the published sets from Chris Juchem’s lab.