The sensitivity takes time. Be patient and do your best to not rush this process.
Sometimes even after years of chakra work the sensitivity and feeling is less some days then others.
You will have periods of strong sensitivity over the years, and some times where it kind of levels out. Everyone is also individually on a different level of advancement. So what one experiences, another may not and vice versa.
One thing to keep in mind. The left hand can be used for invocation and the right is for evocation of energy. A technique that may help with sensitivity is pulling energy into your body from your left hand chakras, and pushing this through and out your right hand, completing a circuit through the Pranic body from left to right.
The breath can be used to guide this. Above all make sure to not over do this so your energy doesn't become unbalanced, but this is a technique I have used some years ago when circulating energy that helped improve sensitivity.
Overall keep moving forward. You got this.