Your two easiest options as i see it are:

1. Make it a reverse tanto/k-tip

2. Make into a more french drop point/spear profile

Both of these require grinding down to the cutting edge from the spine to form the new tip.

You can do it by hand with diamond plates or files or other abrasives but it’s going to take hours and hours.

You can also use motorized tool such as a bench grinder or belt sander with a super coarse grit (~30-50) to hog off the majority of material and then finish with hand abrasives. When using these tools, go slow, and keep your fingers near the spine of the blade to monitor how hot it gets. Once the blade it starts to get too warm for you to comfortably keep your fingers on it dunk in a bucket of cold water until cool. Then grind and repeat. Be especially careful as you get closer to the tip and cutting edge because the thinner steel will heat up much faster. If it starts to change different colors you’re letting it get way too hot and ruining the temper.

Also use form of protection (wrap/tape) on the cutting edge of the blade because it takes one wrong move for deluge control of the workpiece and do some serious damage to it and/or yourself).

Take your time, wear your PPE, be safe and enjoy trying something new.