I think you will find that blade is a lot easier to use safely if you grind away a long notch in the bottom of the blade at the back of the edge where it butts against the crossguard. Give enough room to fit the thickness of your index finger, without pinching it, so that you can wrap one finger around the blade in front of the guard, and the rest of your fingers around the grip, behind the guard. This is called a " choil " by blade makers, or called a finger clip or finger cutout by some. Either way, making room for your index finger to wrap the blade in front of the guard will make it safer to use. With that long a blade, trust me that you will want to wrap your finger in front of the guard! It looks from your picture that you expect to use that flared end of the antler in lieu of a separate hilt or crossguard. That's okay, but you still will be safer grinding the finger cutout.
The other reason to do this is so you can sharpen that edge all the way back to the rear end of the blade, so you have a sharp, straight section of the blade for whittling work, and maybe shaving your chin! Most of the word done by a knife edge is on the curve or point of the blade. But, if you are trimming sticks for camp tent pegs, or cooking tools, you will be using that straight portion at the rear of the blade.
Think first, always, and last that a knife is a TOOL, and the better you make it, the more useful it will be for you. I have put three different angles of edges on a similar knife for a friend, based on what he told me he intended to use it to do, for him. He came back from his camping trip absolutely excited because his knife did everything he wanted to do effortlessly, and he had never had a knife work that well for him before.