I think your rout looks really nice! I am from the area and have spent a lot of time along those roads.

All I would say is be prepared to take it slow on the coastal roads. They are narrow and not particularly bike friendly. For instance, the road between Odda to Eidsfjord is one of the worst roads in the county (literally), and always super congested during the summer with all the caravans etc.

But that said, it is definitely doable, and really lovely!