suggestions

Bring a sword, or make sure there is one available for you. It's a game changer.

Wear a mask, unless you like scars on your face.

If not a mask, wear bulletproof eye protection, unless you don't need your eyes. Bulletproof is not metaphorical.

Expect to get hit, with a sword, fast and hard.

If you want to mitigate the pain, bring padded fencing jacket, glove, extra padding for specific spots (wrist, upper arm etc.)

Bring water. Even in sub-zero weather, you'll sweat. A lot.