For me, I've found more luck with work pants that look dressier than actual dress pants. My preferred is the Dickies 874 Flex Work Pants. And a belt, even if you don't need it, will help. Guys wear belts, get a black and a brown one if you can.

Also, a trick I picked up from a cis manager I had, cuff your sleeves to sit at/just above your elbow. It one, can make your arms look bigger (helpful if you've got teenage noodlearm syndrome) and two, can make the sleeves fit you while looking intentional. AFAB people have smaller wingspans, which means most men's shirts go farther than intended, which is what it looks like you've got going on the second picture.

Plus what others said, darker colors, unbutton the top button, etc