@gopals 

Sir, I think more seat time working w/the switch is the first order of business for you.

Next, don't be reluctant to try other bulb brands if you can't dim as low as you'd like.   I can get to "is it even on yet?" with Feit and Walmart Great Values.   FWIW. unless commanded by a something different (Alexa, a routine or smart control), they will turn on to brightness level they were last turned off at.

You, like many of us, might appreciate the "preset" function I've requested in "suggestions" in recent days.   You might go look for that conversation and chime in of you too would find it helpful.

As to motion, it sounds like you mean "more" sensitive.  In any event, yes the switch has configurable motion sensitivity (range/amount of motion).   Look at the settings icon (gear), then "Motion Sensor".  They also have the ability to configure how long they turn on for and what turns them off.  Select the switch, find and look at "Smart Control", and explore a bit.