I'm no expert- and haven't picked up the cards in a long time- others will be more help but here's a good website that has special tarot forums and info. on the best books:
www.aeclectic.com they are awesome.
There is also another website that specializes in the Thoth deck, but i can't remember it at present. You would probably find it easily if you did a search using "thoth tarot meanings" or something like that. Hope this helps a little. - and WELCOME!!!!!!
Light and Love