i started with an argentine teacher one one. maybe 1 year. 2 years one on one in phx az with a peruvian. lots of congugations. those classes were twice a week for 2 hours. then found a colombian teacher over skype for 2 times a week for 1 hour. my favorite class. i was writing everything i spoke. i wasn’t hearing it so i started watching spanish news and using duolingo which is from spain. i recomend a strong base in castilian
spanish. the only difference in my opinion in argentine spanish is the ya for ll. you will automatically have that if you start learning there. learning slang as a way of communicating is not learning the language. i dont swear in spanish anywhere. che boludo is a good reference on swearing in argentina. i naturally go back to the argentine accent when. i am old and started from scratch at 52. you are not automatically going to understand the varies topics. medical, real estate, stock market, agriculture, family members relation, i could go one. take you time and enjoy the ride. if it takes 18,000 words to comand a language i probably have 14,000. i dont know what fluent is but i get along fine. my goal is business level.