Lots of people ride in Barcelona. There are lots of bikes for rent in the street and also there’s a “bicing” community. If you speak Spanish or Catalan check this: http://www.bicing.cat
If you like nature, there are lots and lots of routes to do in a lot of Catalonia mountains. I’m sure you’d enjoy 😉
With 1800 euros you can live. There are salaries about minus 1000? (“mileuristas”). But maybe you’d have to share your apartment.
If you can, I advice you to keep your job and “telework” from Spain. Here there are lots of people without job nowadays. Being honest, that “Crisis” is very hard… :(
You don’t want to dig yourself deeper into the debt pool, but man, if you prepare all and save some money before coming, you can do this. It’s time for changes, for adventure! 😊