Hi,
Nice start, if you do decide to go ahead with the Shari keep in mind that it Needs to Have reason. With a Shari generally starting from a broken limb, broken Apex and travelling downwards as if the branck/apex took a slice of live tissue and pulled it down , stripping the bark etc to eventually leave a deadwood Shari.Adding movement to Shari can also help disguise taper .
If a shari starts at the bottom it still deserves reason for being there, be that it was burnt out from fire, an area of roots died and caused an upwards shari of the trunk or maybe the trunk was split from a major event and opened up(split apart) which caused the upwards shari which continues to force itself skywards because of the imense pressure now at it's base from the Split. Food for design though.

cheers.
I am the serial pest Craig Murray. Nice to meet you.