Hi. I'm learning Spanish as well and this is a great place for it. I visit Spanish speaking clubs, and have made friends with Spanish speakers. I will have conversations with them in Spanish, but sometimes I have to rely on an online translator. I use spanishdictionary.com. I also have a translator that I can use in SL local chat, but I find that I don't have to rely on that so much anymore. I do well reading Spanish, but it's hard sometimes to respond without checking myself with a translator.
There is someone in SL who teaches Spanish, and I once ran across the school. I'll try to find it and post a link for you.
Buena suerte a ti!