My plan was to make a self defense style.
Confucius spent 3 days to think/create. At the end of the 3 days, he told his students that he preferred to spend those 3 days to study instead.
A PhD student starts to write his research paper because he has studied for at least 20 years.
The day when the following tools are all in your toolbox, it may be time for you to create. Until then, develop your toolbox may be the best thing for you to do.
Tools:
1. Punch - jab, cross, hook, uppercut, overhand, back fist, hammer fist, side punch, spiral punch, hay-maker, ...
2. Kick - front toe kick, front heel kick, side kick, roundhouse kick, hook kick, back kick, inside crescent kick, outside crescent kick, tornado kick, jumping double front kick, jumping crescent kick, ...
3. Knee - upward knee, horizontal knee, 45 degree knee, flying knee, ...
4. Elbow - horizontal elbow, upward elbow, downward elbow, forward elbow, backward elbow, ...
5. Lock - finger lock, wrist lock, elbow lock, shoulder lock, head lock, spine lock, knee lock, ankle lock, ...
6. Throw - single leg, double legs, hip throw, leg twist, leg spring, leg lift, leg block, foot sweep, ...
7. Footwork - forward step, backward step, side step, wheeling step, circle walking, circle running, long distance advance, long distance retreat, ...
8. Ground game - full mount, side mount, arm bar, leg bar, choke, ...