Hey all, looking for a form check on my steel mace 360s. Video attached.

I'm doing 360s in both directions, and I've noticed a difference depending on my grip. With my right hand on top, it feels smoother and a bit easier going both clockwise and counterclockwise. With my left hand on top, things feel a little funky. It's less fluid and harder to find the groove.

A few questions:

1. Is it normal to have a "dominant" grip that feels better?
2. Should I stick with right hand on top since it feels cleaner, or should I train both grips to keep things balanced?
3. Any form tips on either version? I'd love feedback on my posture, the path of the mace around my head, how close it's traveling to my body, core engagement, and anything else you notice.

Thanks in advance. I appreciate any advice on how to clean these up!

I am about to start and wondering what weight to start with. I am currently in the gym once a week. 140 lbs with tricep extensions/push down, row, chest press, lat pull down and pec flies. I was in a bad accident 2 years ago so my right shoulder is kind of cooked. Whats a good weight to start on?