hello there...
to answer your questions from my perspective:
the spirit can work with every translation. the NT is written in koine greek for a reason so that from the king to the garbage collector can understand it. the word of god is manifest reality, so yes the KJV is a great version that has a special weight to it, but you cannot say its the only or best version.(like some peeps do).also you can see in gematria that god forms and shapes the language, in gematria you see the geniality and perfection of that, so you cannot say that english per se is a less spiritual language than others.
i hve read in german, i hve read in english, i hve read in french,even some in spanish, i have read the bible 4 times thru in the last 10 years, and i daily read bits of it. everytime i discover some new translation, be it the german volxbibel (its like "the message" in english, a very free translation with slang), or an old english translation of the syriac pshyta in some college library, i still get that "wow" feeling.
about hebrew, well hebrew is different. hebrew is very old. hebrew will probably be around when we´re long dead, and it was around for thousands of years. my personal belief is that the earth goes in 7000year cycles, and that cultures and empires come and go, but that hebrew always stays. so if you learn hebrew, you invest in your children, because sometime during the next 300 years the millennium is gonna start and hebrew will be the reigning language (my personal opinion). also you have a connection to the jews and israelis that also speak it.but apart from that, in the world it has little use.
learning hebrew will open up new spheres of understanding to you, that goys cannot see, because there are many things that work through hearing and speaking rather than just the written word.also, most OT names have a meaning in themselves that will all come clear for hebrew speakers. if you know king david´s father was called "jishai" you know that he probably was a well to do/rich citizen, not just some employee. if you know that "ebed melech" the negro pulled jeremiah up out of the cistern you know it was in fact the "servant of the king" who did it. etc. etc. davids generals were the "sons of zeruiah", and fought his wars for him, if you know your hebrew you know that "zeroah" means "arm" in hebrew, so they were the "arm of god".
as to spanish, i took spanish for half a semester in uni before dropping out again (i am no good at traditional education facilities), but have worked hard on that with vocabulary etc, and i guess it will do me good because all south america speaks it apart from brazil, and now with the flood of mexicans into the states also its an important language.
so its up to you if you´re more mundane you can start with spanish then go to hebrew
if you are a more spiritual person you can go for hebrew and do spanish on the side later.
PS: i forgot to mention i started learning hebrew bout 10 months ago, and will definitely pursue the language until i can comunicate with israelis in modern hebrew as well as read the newspapers and listen to hebrew movies. biblical and modern hebrew are not soooo terribly different. when i read my JPS tanakh i understand parts of it, it helps if you know your bible of course. but its still a must to have a bilingual translation (english/hebrew).