Most first year classes you could probably self study and pass no problem. I would suggest learning hiragana and katakana first. Numbers, in my opinion, should come after the alphabet, but it doesn't really matter. If you really wanted to I'm sure you could learn hiragana (but not necessarily master) in a day.
$335 for a year of study
and a paid trip to Japan? If it's not a scam, that's one hell of a deal.
If you can try getting your hands on an actual university Japanese language class textbook. I'm sure you can find them all over the internet with a simple Google search.
www.abebooks.com is a great website. I wish I had known about it when I was paying $500+ for textbooks
A great tip for learning the alphabet, numbers, etc. Flashcards. They can work wonders. Write (or better yet, print) the hiragana/katakana symbols onto a flashcard. Then on the reverse, write the romanji equivalent. If you want to go even further, write simple Japanese words using the hiragana symbol. That way you can work on your vocab, as well as learn multiple hiragana at once and how to read them together!