If I could, where should I emmigrate to Spain, Florida, California or Australia?

If I had to choose, I would choose San Diego, California. Temperatures are pretty comfortable year-round. However the taxes are pretty high and so is the cost of living. I think it is most important for you to be able to find a job where you want to live. Also if you are not a citizen of the country, how willing are the people to hire you? I think you should go and take a vacation to these destinations. After awhile there, you may see things that make you glad be living in Scotland.