Curious what your motivation is for learning the language? Spanish can have lots of regional variations and slang so this might be important for you.

Dominicans, Mexicans, Spaniards, etc. all speak very differently. Think of the difference between English from Australia, the north of England, or Texas and you get a sense of how varied Spanish can be.

The Spanish you use informally with friends or a love interest may not be appropriate if you plan to converse in a professional setting with colleagues or business clients.

I recommend a low-cost community college course as a good way to get an understanding of grammar and fundamentals.