Thanks for all the advice. I am going to sign up for Judo and Brazilian Jiu-Jitsu now, and drop the one I like less after one week (2 sessions).
Here is information from the supplemental martial arts brochure:
Grappling Martial Art that specializes in ground technique
in real life situations. It encompasses throws, sweeps,
takedowns, positional control, positional escapes and
submissions by chokes, limb, and joint locks.
Judo will empower and develop participants to be strong
and athletic. Throwing, pinning, chokes and joint locks
are all allowed in this Olympic sport which is also a great
means of self-defense.
Learn Kung Fu style (Shaolin) emphasizing striking, kicking,
throwing and grappling; and a weapon form
Muay Thai is a practical, combative martial art form
of kickboxing that allows hand, elbow, knee, and kick
strikes to the head, body and legs. Thai Boxing is known
for its hard-core, high-level cardiovascular and strength
conditioning from training with kicking pads, sparring drills
and intense calisthenics.