I'm currently learning Spanish, polish, and a bit of Italian, and I want to get into some Japanese. I started with Spanish and Polish back in late 2013 / early 2014, and just started Italian a month ago. I've been considering holding off Italian (since it's very similar to Spanish), and holding back learning Polish (since both of my parents speak Polish all the time, so it's unlikely for me to forget any vocabulary, and if anything, only an infinitesimal amount). I haven't been studying Spanish as much, because I feel as if I should be learning Japanese; I've been wanting to learn it since I started studying Spanish back in 2013/14. I've been getting so much free time lately, but I can't get myself to even begin to study Japanese. Let alone keep up with Spanish and Polish. Please give me some advice on what I should do.