Welcome to the site mate.
There are heaps of knowledgeable and honest members on here and in my opinion the site is very newby friendly.
Price wise you're always best to check ebay completed listings and if you're a team collector of the Bulls you might want to set some goals instead of chasing every Bulls card under the sun. ie. autos only, memorabilia only, base cards only, players from the 90s only, players from the 90s in Bulls uniform only.....you get the idea.
If you need any advice feel free to ask or post a new thread.