Update notice in README

README.md

@@ -8,10 +8,11 @@ Programming Interface (API) should be expected to change without warning.
 **NOTICE:** We are in the process of open-sourcing the single-diode equation (SDE) and 
 single-diode model (SDM) fitting algorithms (🎉), and thus moving the related code here.
 The SDE move is reasonably complete, but the code for SDM model fitting is not yet
-finalized on the `main` branch. Likewise, the documentation badly needs updating.
+finalized on the `main` branch. Likewise, the documentation badly needs updating, so for
+now we refer users to the `demos/getting_started.py` modules in the various subpackages.
 
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