So do you speak Spain Spanish, or Latin America Spanish? My guess is the former. That's cool that you have that intrest to learn laguages. I grew up in a somewhat multi-lingual family, both parents are fluent in French (I understand way more than I speak), and my Brother is fluent in Mandarin Chinese. My Bro and I always sit back and compare the two asian languages, it's a blast. He has a BS in linguistics so he always makes me feel stupid. He understands the breakdown of Thai grammar better than I do, but he doesn't even speak it!
-Evan