Visas

Hello!

I am new to this space and wanted to ask about people's experiences with getting their visa. I don't have a job lined up yet but I'm planning on moving from the U.S. to Barcelona, Spain by the end of 2018. I wanted to know about what kinds of visas you all acquired, how hard it was, how long it took, and why you chose that specific visa? I am looking into visas right now to apply but it's a bit overwhelming! Any and all tips, stories, or experiences are greatly appreciated! Thank you!!

A visa will be for the life you live here.
Work
Retired, non lucrative
Investment

Maybe I have missed one or 2.