Hi, try your local town hall, as many provide spanish lessons, often free, but be aware they are taught only in spanish. If they do, you will need your passport, padron (just to prove you live in the catchement area) and your NIE number to sign up for the lessons. There is probably a time window to sign up, at my town hall its during september. If you can go this route it is better if you have the basics of the language as many people drop out by Christmas. Hope this helps.