I also fenced foil,sabre,and eppe for a few years decades ago.
Of course,I cannot do now what I did then. But the quadrants,the lines,the perrys ,attacks ,footwork ,distance,..it has not left me
All of those were one handed weapons.IMO,generally not the best plan with a cane. Retention is weak.
In the same gym was,IIRC,a kendo club. I think kendo is the right term.
They used a bundle of reeds or bamboo to simulate a katana.Some things different,but many things similar to a one handed sword. But its two handed.
Held two hands,mostly midline,point up,in front of you,you are set to parry/repost effectively. There is a very quick strike,while there is more involved,the upper hand punches forward as the lower hand pulls back.
A lunge and arm extension can be included,or actually a short step back,.Feet are actually not far apart.Better for mobility and balance in all directions.Like a dancer.
The opponents hand will be the closest target,or wrist/forearm.Plenty of power to break hand or forearm bones.
That strike will also work on collarbones. It can be rotated to the side of the head or the neck. There is something about incorporating snapping it back to the guard position makes it even quicker. Its a quick pop. Balance is retained.
Mobility in all directions is retained.
Of course,from that guard thrusts and a full swing can be made, but the quick,push /pull pop is like a jab. You can destroy hands and forearms.
Also,with two hands on the stick,techniques similar to rifle/bayonet moves can be used. Like a butt smash .
If you have a weighted head,like a brass ball,I'd keep it close,as a counterweight initially. It will increase the quickness of the strikes and provide better retention.
Though certainly using the weighted end as a mace would make for deeper,perhaps fatal trauma.
The laws will vary state to state. The "other weapons" question came up in concealed carry class. I'm not a lawyer,don't take this as legal advice.
I was told that in Colorado,only a handgun may be carried with the CCW permit as a CONCEALED weapon. Pepper spray,knife,collapsable baton,etc can be carried if they are not concealed. There may be restrictions or local laws around that. Example,it may be brass knuckles,nun chucks,switchblades,etc will be outlawed.
It might be that if you are in a situation that warrants deadly force to defend yourself, I'd think using a cane would be as legit as using a Glock.