ianal but: don't perform personal work while you are employed by an employer in the same industry. Or at least make it like you didn't do that to any observer.

You may have misunderstood the topic, which, I'll remind you, is confidentiality agreements that act as lifetime non-competes, which means for the rest of your life after you are employed by an employer in the same industry, not while you are employed by an employer in the same industry.