It is a good idea to play poker to improve your skills.I think that trading is a lot like gambling and the only difference is trading has better publicity compared to gambling.
While gambling is considered bad by most of the community trading is considered neutral.However you should be careful as both in gambling or trading you risk to become addicted.
I also think so, although poker is not entirely about luck, but in my opinion poker is different from trading, in trading you cannot just prioritize or rely on luck to be profitable, you need lots of strategies and skills, and trading is not about having fun like on poker, but its okay if you want to do poker to hone trading skills, I don't know if it's related, but it's not a problem to try