Beginner's guide to using CST for drawing，simulating antenna

Hi, Im new to CST.I've been searching online for any info on the step by step guide to using the software for drawing and simulating antenna (a simple basic simulation would be a great start)!
Can anyone please help me by giving suggestions on where exactly (online) I can find the best source for the guidelines to using CST (As simple as possible to understand and follow as my guide to CST)? Apart from it's manual/help topics.
I have exactly 1 month to learn on drawing and simulating an antenna using CST before presenting it to my prof.
Thanks a bunch!

CST manual has many example from scratch about different antennas