If you want to learn spanish, then you should listen to any person who speaks spanish, native or not, to learn all the different accents, expressions... I think every spanish speaker make mistakes when they speak or write, just like in any other language. I have read that the best place to learn a correct spanish is in Castilla y Leon, I don´t agree because you can learn a correct spanish anywhere and with anybody. But that is what I read. It is important to speak correctly but It is also important to understand and been understood. You don´t need a perfect spanish to get to that point and the perfection it is only a matter of time and effort, keep listening, speaking, reading and writing and you will get it. Hope I help.