A few recommendations:

1) Eat at Mexican restaurants and engage the servers in conversation. I have been around Central American culture and Americanized Hispanic culture my whole life. If you make an effort most of those servers will appreciate you trying and may in turn try to teach you something in return. Much of the problem many Hispanics have with 'Gringos" is that we don't respect them or their culture. Showing an interest in their language will go a long way to reduce those feelings.

2) Spanish, like any language, has 3 dimensions: a) spoken b) grammar (reading and writing) and c) heard. A and C are often lumped together as conversational but they should be separate. Take a Spanish course and you can speak Spanish. Then try to take what you know to a Spanish speaking country and find out that you can speak but not understand.

3) Dialects. A friend of mine that I used to work for owned a successful computer business in a medium sized town (450,000 + people). He wanted to start an organization for Hispanics in that town. They had people from Dominican (like him), Puerto Rico, El Savlador, Costa Rica and Bolivia all attend their meeting. What he discovered is that these people who spoke Spanish from birth counld not communicate! The language varies so much from country to country. If you get on a Spanish speaking WoW server you will find a lot of this.

Why do you want to learn Spanish? If you have a good enough reason, and you keep that reason posted somewhere you can see it you will be motivated to learn it. Muscling through RS will give you about 1/3 as much knowledge as you will need. If you are passionate about it, and you devour it, you will learn a ton more. Maybe just roll new a new team on a Spanish server. Do you have any Spanish speaking friends? Bug the snot out of them. Take a vaction to Mexico. Generally, however, any place in Mexico you visit will speak English very well. There are tons of ways to meet your goal and I like the idea of marrying WoW and Spanish. Just be careful not to make an expensive mistake that you can't undo.