Any language is better than none. It's much easier for someone who is familiar with two languages to learn the basics of a third language, than it is for someone who has only ever spoken one language to learn the basics of a second language (his first foreign language).
Possibly. I just know that learning Polish, it is being hard for me to distinguish sounds despite speaking various amounts of Spanish, Japanese, German, Hebrew, and Bahasa Indonesia at various points in my life.