I tried and to be honest no i can't.
Redickclueless///
Get flexible,,what are you stats? height , weight, can you touch your toes without bending your knees? If you are to out of shape or unshapely I apologize in advance , not trying to insult.
There are many ways to reach your walnut solo, with finger, and work up to two. Take patience and some time.
Try crouching down, feet shoulder width apart, lower chest into abdomen reach in front, between legs with left hand, grab on to something stable with the other hand, insert middle finger into anus, your open palm shout be cupping taint area or balls now, and reach in and down and back and then up and forth come hither.... you will feel the walnut , lots of lube, do circles , feel around in there,, feel the rim or ring oh, please clean out very well with a good series of hot enemas and get good a loose in there.