You'll at the very least learn the basics of kicking. However, Olympic style TKD (aka WTF TKD) is definitely not a good example of effectively using those kicks. The kicks you would learn from them would work in a WTF sparring match and other TKD matches, but will only be good for little surprises in any other match because the opponents might not be used to encountering them. An ITF school might be a little better because you'll use your hands more, but the downside there would be a point-sparring system. If you really want to learn the basics, then by all means, go ahead and try the WTF school. Just don't spar like them, or most of them at least. To see what I mean watch this guy and compare him to most other WTF styled TKD practitioners. He's a mix of TKD and kickboxing.