Hi and welcome to the forum.

I'm a bit north of Portugal (in France) but have lived in various parts of Europe for some 15 years now. There are far more mixed race couples here than I ever saw back in the States. While I can't say Europe is free of racism or discrimination, it does seem to be a very different sort, based more on cultural differences than on skin color.

But, coming from the US, you need to be ready for what will seem like insanely oppressive bureaucracy when it comes to starting or purchasing a business. It will be absolutely necessary for you to speak, read and write the language reasonably well in order to have a chance at succeeding.
Cheers,
Bev