Looking for advice - Want to move to Spain from US.

Hi! I’m a 27 (F) living in Washington State and am looking to get out of the US. I recently spent 3 weeks in Spain and fell in love. I know some Spanish now and I am actively working to become fluent. I don’t know anything about getting a visa or dual citizenship does anyone have any advice for me? I currently have a house in the WA, a dog and a cat I’d want to bring with me, and would be willing to quit my job and find a job in Spain or remote position. I’d even be willing to sell my house or rent it out while in away. I mean I definitely wouldn’t be able to afford or want to keep it empty and my mortgage cost 2/3 of my income. Please help any and all advice is greatly appreciated! Thank you! I like the idea of living there a year to three years to start.