Well Ibuki really isn’t very beginner friendly, but you can pull out a few wins with any character when played right. Ibuki forums are a great way to learn the character more in depth, but for starters I think what you should really focus on is learning all of her normals (i.e. which ones are good pokes, what’s your AA, etc.) and specials, and when to apply them (i.e. using AA when somebody jumps in, obviously).
While you’re learning the basics, a good habit to get into is be patient, and watch for your opponent to make mistakes. For example, if they try to sweep you but you block it, you have a TON of time to retaliate with something that’ll put out some decent damage, you could either sweep, start a combo (more advanced), or throw out a special. Any big moves that you block or avoid are generally opportunities to punish that are very easy to take advantage of.
Worry about combos and Ibuki’s vortex (probably the most advanced part of her game) later, for now just learn fundamentals and patience. Also there’s a thread on the first page of the Fighting Game Discussion forum called “Footsies guide…”, read that, and make use of it. Learning to zone and make use of footsies and patience are some of the most important things in this game.