1st Grow - OR Huckleberry

That's not nute burning bud - you can tell because of the lack of uniformity. If it were nute burn you'd see the very tips of ALL the newer leaf growth start to go a little yellow. In your case, it's only presented on a localized area of the plant and it's also spotty across various fingers of the affected leaves which suggests that particular part of the plant is in a hot spot for your grow light. Makes sense given that the area in question is pretty much in the middle of your grow space. I'd run your light up a couple inches to 20"-24" from the canopy and you should be fine. She's still only in the 1st week of transition so she doesn't need to be blasted at close range just yet. Best of luck!👍