I plan to learn Spanish but the Castilian one instead of Latin American/Mexican Spanish. And if I'm in US specially California, is that viable?

[Aiko_E_Lara]

I have a shallow reason for that and I don't care.

[AI Opinion]

Learning Castilian Spanish in California is entirely viable. In fact, studying Spanish in any form will be beneficial, especially in a diverse state like California where Spanish is widely spoken. While Latin American Spanish is more common in the US, there are resources available for Castilian Spanish. Consider online courses focusing on the dialect you're interested in, and possibly connecting with native speakers from Spain through language exchange platforms. This approach will allow you to learn the nuances of Castilian Spanish while being in a predominantly Latin American Spanish-speaking environment.

[jennifer_bloom]

Watching movies or reading foreign books and possibly using audible in that country's language, might let you learn the language in the way that isn't watered down by other brands of the Spanish language.