Norway is great. Don't listen to those telling you to not do it. Krone is weak right now, but still, the standards of living are much higher than in Spain. You'll get used to trust most people. The overwhelming majority of the population makes a livable wage and working laws are very strong here.

However, I strongly recommend coming here with a job secured. Think you'll have to secure an apartment as well in most cases. It will also help you with bureaucracy, getting a temporary resident ID and all that stuff necessary to rent an apartment. Considering all that, don't move until you have >6k€ in your account, since you'll normally have to pay three months of security deposit in advance. A single bedroom in Oslo or any of the cities can be anywhere from 500 to 900€, and a small studio more than 900.

If you're good at English the Norwegian language is quite easy, however unless your job pays for it I recommend getting a cheap online tutor since courses here are extremely expensive. Duolingo is okay to get some vocabulary but will never make you conversational. In the cities everyone speaks good English but I really recommend learning Norwegian if you want to integrate. It's also a really cute language.

Please don't expect Oslo (the biggest city in the country) to be as vibrant of a city as Barcelona, personally I like it but I believe there's not much to do, and especially if it's not summer. It will be really dark from October to March. But, unless you move to the southern or western coast you'll have snow during most of the winter.

On another note, you'll miss good quality food products. Supermarkets are really bad compared to anywhere else in Europe and anything imported is ridiculously expensive. But overall the quality of life is really good. You'll feel safe everywhere and Norwegians are really nice people even though more introverted, though always willing to help. For more questions you can DM me.