Google Maps is not an acceptable source.  I know, it's tricky.  But here are a couple links to read up on:
https://wiki.openstreetmap.org/wiki/Legal_FAQ#Can_I_trace_data_from_Google_Maps.2FVirtual_Earth.2FOrdnance_Survey.2F....3F

https://wiki.openstreetmap.org/wiki/Potential_Datasources

I've even had it where Google Maps gets it wrong!  But due to copyright issues, Google can not be used as a source for OSM.  Probably the easiest way to contribute when out and about is an app called StreetComplete.  It allows info to be directly added when on foot visiting businesses, etc.

If you have any questions, please feel free to reach out.  I would be happy to answer any you have or get you in contact with the right people.  We also have a discord that a lot of us are on.  :D