Haven't learnt any Arabic personally, but I don't see why not.
I'm learning Manx independently, and whilst it's supposed to be a difficult language to learn, I'm finding it quite easy. If you're as focused and intersted in both languages as you say, I don't see why that wouldn't play to your advantage - however you went about learning it.
Big tip though: don't trust Google/Bing to give you accurate translations (particularly with Spanish).