The pose seems ok but her head position doesn’t quite match the rest of the drawing. Maybe try having her face left (side shot) with her either looking forward or slightly up.
Also her front hooves need to be more pointy (in this drawing, the top parts)
Notice that the sonic pony’s hooves seem off, thats because they are rounded off weird for the pose they are in. But Silver and tail’s hooves look right. They have a tip in the direction the pony is facing, i.e. forwards. for this pose you’ve drawn, try something similar to silvers raised leg in terms of how the bottom of twilights hooves should lookish.
Also her front hooves need to be more pointy (in this drawing, the top parts)
As a random example, review this image (https://derpibooru.org/1432765?q=pony)
Notice that the sonic pony’s hooves seem off, thats because they are rounded off weird for the pose they are in. But Silver and tail’s hooves look right. They have a tip in the direction the pony is facing, i.e. forwards. for this pose you’ve drawn, try something similar to silvers raised leg in terms of how the bottom of twilights hooves should lookish.