By car – Norway has a fairly good road network and it is in general very safe to drive your car here. Be aware that some roads have tolls, this can usually be paid at local petrol stations. Norway is also starting to get a lot of fast chargers for electric cars, both Tesla supercharger network and other fast chargers for both CCS, Combo and Type 2 from vendors such as Grønn kontakt and Fortum.
Electric vehicles are still exempt from toll on roads in Norway and get from full to 50% discount on ferries dependant on the company one travels with.
The Norwegian Public Roads administration (Vegvesenet) has a lot of good info on where there are roadworks and such that could be of importance to your trip
By train – The National Rail Service (NSB) runs all across Norway
By bus – The company TIDE is one of the companies that serves all of Norway. Their webpage is a one-stop shop for not only their own service, but also public transport links etc.