Oh cool! In that caste totally go for it! It'll be hard to get good at it with out at least one person to speak it with, but I'll still be here for ages so I can at least write to you! And answer questions if something is tricky.
Getting the grammar down will preoccupy you for awhile (since the word order is different from most languages and it uses particles). Again, you can use just about any site that comes up in a Google search. As for the writing system, you'll start with kana (hiragana and katakana) which aren't too bad, though there is 46ish characters for each. You probably won't have to write it much but reading will be vital. Kanji is always a pain, but your goal will be learning those that kids in Japan learn through school, known as the joyo kanji. I don't recommend touching Kanji at all until you've got the basic grammar and kana down. When you're ready, look for a kanji resource that has you learning them by grade level.