You've been at it 3 weeks and you still haven't been taught the form? Have you at least worked on the basics in isolation?
I have to agree with Mook. That is a bit concerning. Usually, Sil Lim Tao is the first thing you start off with. It's essential for building a solid foundation. You don't normally get into full blown chisao for quite some time -- certainly not before having learned the first form.
I actually was taught lop sau, footwork and feeding for a while before learning SLT.