When I arrived in Buenos Aires in the beginning of 2010, I could barely order food in a local restaurant. Two years later, I calmly explained the mechanics of Russian grammar to a Guatemalan friend… in her native Spanish.
Today, I’m conversationally fluent in both Spanish and Brazilian Portuguese, and low conversational in Russian. I’m not going to blow smoke up your ass and tell you it was easy or that there’s some shortcut or hack. I practiced my ass off. Honestly, I’ve seen the supposed “hacks” for language learning, and none of them worked for me. It took hours of study combined with stumbling through many, many conversations.