Are you able to use it like this?

There are representative chopsticks. (a) is a type for  home use, (b) and (c) are called harf-split chopsticks by a dispotable type used at restaurants. We call it "waribashi" in Japanese.  (c) is a cheap(economy) type.

Waribashi( half-split chopsticks) are used like a photograph above.

Two chopsticks pull up together and insert a middle
fingertip between chopasticks and hold.

PRACTICE OF HOW TO HOLD AND USE
It's an exercise of how to use it from next.

One chopstick hold like an upper photo.

This is a bad exmple.

Another one hold like to hold a pencil.
But there is a difference, we hold a thumb strait,
don't bend like to hold a pencil.

When I open chopsticks, I use the middle forefinger.

When I close it, I use a forefinger.

A thumb is used to hold a chopstick, and it almost not move.

When I catch a heavy thing, power is added to upper three points.

It's the feeling that is used to control it by a forefinger.

Put up chopsticks on a desk and do it opening and closing is effective, I think