I have an even lighter tongue that twists.
Some tips I used:
Make sure the wheel is under the tongue, not rotated to the side.
Use a Jack stand to remove weight from the trailer jack. Crank up a bit more and lower onto the Jack stand on the opposite member.
I used a fence wire from the frame to the trailer jack to straighten it. The wire is doubled and by twisting with a screwdriver it makes a Spanish windless to ajust tension.
All these are fast ways to help. Your tongue is engineered okay for a light trailer but not for your jack. Getting a Jack that fits in the A is a good solution. Replacing the single tongue member with a box member the same size is another.
Tt