As a Swede, I always feel sort of flattered when people want to learn Swedish [:D]
A word of warning, though:
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Vinlandr</i>
As I get better at it, I will incorporate more Old Norse words to make it more authentic as I go along.
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If you do this (the way I imagine it from your post) you will be speaking modern Swedish with a couple of non-Swedish words thrown in, which will NOT be more similar to the language of the vikings than modern Swedish is. Swedish has developed from Old Norse, but it has lost a great deal of grammatical and syntactical complexity in that process. The result will be the lingustic equivalent of wearing a perfect reconstruction of a viking tunic, made from handspun and handwoven wool, along with jeans, sneakers, and a horned helmet, i.e. authentic is not quite the word...[:)]
Just go for Swedish for now, is my advice, and that knowledge will help if you want to move on to Old Norse in the future. I hope you'll succeed in your studies and won't get annoyed to death with the weird spelling and such [;)]
Good luck!