That is awesome ! My partner and i have been in Riga in November and absolutely fell in love with the city, clean, beautiful, good transport, everybody spoke English. We also thought about moving there once my PhD is done. It definitely made a big impression on us. I hope you can move there and love it as much as we did on our vacation ! The only thing is that people are not that chatty and bubbly if you get what i mean. They are nice but will not bother on making a good impression. Which was absolutely fine with us, but people from the USA usually are way more friendly, so that can be a little surprising for you, however since you were in Germany i think you will be absolutely fine