If you wanted further afield, you could get the train all the way to Oslo!
5-7 hours, but it’s apparently the highest altitude by a mainline train achieved in continental Europe! Certainly spectacular I’ll give it that, My missus complained about how many photos I took thru the window, and the same train hooks up with the Flam railway.
Mr’s and I had 1st class (komfort – inc. complimentary drinks larger seats) day train and 2nd class (still pretty classy) overnight sleeper back. as a 24-36 hour trip between the two cities. Was a bargain. The entire return train journey was less than London-Scotland standard single fare!! Ignoring a sleeper cabin a seated fare can start from as little as £30ish each way
Norwegian Railways website
Car hire can be expensive and the country is mostly ruled by a national speed limit of 80km/h give or take some Motorways nearer Oslo.
2 Erdinger wheat beers cost us over £30 in Bergen last year but I new that (My mum is Norwegian expat of 45 years I go regularly to Oslo to visit her family)
Try not to eat english, if you don’t mind living off ‘northern european style hard/crisp breads and lots of cheese and cured meats, fish, potato (basically anything you could by in IKEA food dept 😆 in can be fairly OK) The country basically has something like a 100% luxury tax on things like fizzy pop, booze, sweets etc, so avoid them and stick to staple things.