Suggestions for Learning Spanish
Obviously you can learn Spanish on your own. There are a good number of programs you can buy or possibly get from your local library in CD form and there is at least one online source.
Here is an excellent one whose links are to free sources.
A lot of people like the idea of going to a language school in a Spanish speaking country, but don't know where to begin. Probably the best approach would be to first decide which country you would like to visit and get an idea of where to go there. In Maya areas, there are schools in most places that you would want as a base to see local culture and ruins.
Here are some of my thoughts on such schools, not based on my own experience, but those of many others. Almost all schools will arrange for you to live with a local family. Some only deal with introductory Spanish, so if you know even some, you might find it boring to be in one. You may decide you don't like the school or the area or even both. If you prepay for more than the usual minimum of a week, you will be out of luck for a refund.
A good source for helping you decide which school to attend is 123teachme.com, where you can get an idea of prices and read appraisals and comments by others. Note that these are not by the ones maintaining the site, so there can be agendas. Be doubtful of any that give five stars to everything. One comment I found dubious was an allegation that a particular Spanish school was the best in Central America.
For a list of what the site touts as the best schools in Guatemala, try Guatemala365.com. There you can choose from only 32 schools.
Here are some of my thoughts about some possible locations for learning:
Antigua, Guatemala. This would be okay if you stay away from all the tourists or hang out with others who agree to speak only Spanish. Otherwise, you are not immersed.
Cancún, Mexico. Downtown is a real and dynamic Mexican City as you get away from the bus station, but I imagine that the city bus takes quite a while these days to get to any public beach in the tourist area.
Copan, Honduras. This sounds good. It is a pleasant small city near some wonderful ruins..
Mérida, Mexico. This would be a good and pleasant venue for learning Spanish. There are a lot of day trips to do on weekends.
Flores, Guatemala is a pleasant small city on an island. There is one very good school in town and a couple others across the lake.
Quetzaltenango (Xela), Guatemala. This would be okay if you enjoy the cold.
Todos Santos, Guatemala. I wonder at learning in a village where Spanish is the second language, but otherwise, it sounds interesting.
Valladolid, Mexico. This is a pleasant small city with one school. Although the one respondent as of now gave it just one or two stars, his comments would have suggested it deserved a better rating.