Keurig Is there a way I can make surfing and commenting happen platforms such as Instagram, Facebook and Twitter ?
Not sure I understand this question, but one very effective way to continue using these social networking sites is by using their web apps. Facebook, Instagram, and Twitter all have very functioning web apps.
Benefits of using the web apps include: they don't have access to do IPC or see installed apps on your phone, benefit from both Vandium + Android's sandboxes, safe to use web apps in any profile, web apps have more restrictions to when they can run, you can control permissions to the web apps within Vanadium.
Keurig I have yet to actually install Graphene yet from what I've gathered there are these 'profiles'.
Is it at all possible I could create a 'fake background/id' and use said platforms as I please ?
You can totally create a profile for social media and provide fake info, like fake contacts. I have a social media profile on my phone.
Here's some info about profiles from the GrapheneOS website.
I used Waze when I visited the US last. It worked perfectly (but I used sandboxed Google Play to help with GPS)
Keurig How dose Graphene handle the 'location/mapping' data. Can I still remain anon ?
You can have the OS handle geolocation on your phone. The biggest disadvantage to using the OS for location is it doesn't work indoors since it only uses GPS signals, as opposed to the Google geolocation which uses lots of data to for better/faster location services. But, since you're driving, the phone should be able to "see" the sky and receive GPS signals. It just probably won't work indoors, in parking garages, tunnels, and maybe under really big bridges. It'll likely be less accurate around many tall buildings.
Some more info about the OS providing location vs Google Play can be found here, and here's a specific quote:
Re-routing location to the OS geolocation service will use more power than using the Google Play geolocation service since we do not provide a network-based location service and implement it via GNSS / A-GPS only. In the future, we plan on providing a pseudo-network geolocation service for the OS by using a local database of cell towers, and the location redirection feature can also make use of this future OS implementation for network location requests once it's available.