Want to fill my chin with fat, but not sure if what i want is doable, help me please. (photos)

While fat grafting may be able to push out the labiomental fold that much, the result would not be maintained due to the tightness of the tissues. It would likely require a second fat grafting sessions to get close to that result. The other option would be to fat inject the fold and place a dermal-fat graft intramurally on the bone behind the fold as a combination procedure to get the optimal push out on the fold as a single procedure.

I for one think you look better with you lower lip as is. I think it makes your chin look too large and long with the crease removed. If you must try this, I would do it with HA fillers which will give you an idea of what it looks like before committing. Fat looks blobby in the chin, it does not give enough localized projection.