Your going to want start simply adding on to what you already know.
Learn to manual farther.
Take that 180 and start trying for 360s.
You can start adding the tricks you know into your 180s and 360s.
Once you learn tailwhips, keep practicing get them perfect, and learn to do them off ramps, curbs stair sets.
Barspins would also be a good beginner trick to learn.
One thing to remember once you learn a trick. Dont forget about it and move on to a new trick. Make sure you practice and get your tricks down to the point where you can throw them whenever you want.