Please tell a newbie what to defoil / lolipop here?

you've got a couple weeks of vege or more remaining... maybe some heavily shielded stuff at bottom that will never see much light is fine to remove. if you have overlapping leaves resting on each other, that's another ok reason to remove some foliage. this causes standing water on the lower leaf and that increases risk of infection. take off as little as you can. it's an autoflower, so not a huge need to lollipop much. leaves power growth and everything else... the top ones absosrb the most light. Light from a single source spreads out in accordance with inverse square law, which means a short distance can drastically reduce potential light absorbed. it should be tough to rationalize removing leaves. have a good reason.