Free throw misses rim, violation, mechanics?

[BigCat]

I would raise open hand. Point at rim and yell, "violation,ball did not hit rim. Blue ball, point direction. Then spot throwin there" while pointing to spot. (If it is close to hitting rim.) if complete and total air ball raise open hand,point direction and then spot of the throw in.

I do twirl on basket interference every now and then. Nothing else.