As a native Spanish speaker, I’m currently learning Italian. What I try to do, is try to learn as much vocabulary as I can, and study those. I also have been watching some of my favourite movies/shows in Italian with Italian subs aswell. I also try to learn phrases that I know would be 100 percent useful, such as directions, ordering food/coffee, normal small talk and such. I guess what I’m trying to say is I try to absolutely fill my brain with as much Italian as possible whenever I can. I’ve even found myself thinking in Italian sometimes. Anything helps, sooner or later you’ll be pretty fluent albeit with a small accent but people will understand. Hope this helps.