I'm a spanish guy who wants to learn marathi!

Hello everyone!! I'm from Spain and I've been dating a wonderful girl for the last 6 months. Her mother language is marathi so I would like to learn it. I've been playing Duolingo hindi's course for a while, which helped me to learn the alphabet and all the weird (for me) characters. I could start learning hindi but I would prefer to just learn marathi instead, I tried to found resources but it is a little complicated. What do you recommend me to do? Any suggestions about the best way to learn the language? I only know three languages, spanish, galician and english. Thanks in advance!