If you register now, you can get into the draw for time of enrollment which may be either on 15th or 16th. On 17th, all courses are open to all for enrollment.
But for abacus, normally it won't get full so early, guess you can try on the 17th after 2:15pm.
I don't think they get the course outline on their web. I need to check with my hubby how to send the details to you. (I am quite an idiot in using computer). In the meanwhile, you can check with the center. The phone no. is 2741 6294.