I think there is a few things you can do. I do think the best and healthiest thing is to just take it as a compliment, but keep your ID close if your are doing something that needs verifying.

But, if you(or someone), doesnt like it, and it is causing you issues mentally(perfectly valid). Then you can not shave as close or as often, works better the thinker and more consistent your stubble is.

Dress older, this is a lot more expensive, but can look at things like chinos and relaxed jeans with polo shirts or as we are approaching winter more knitwear, you would also be looking at boat shoes or loafers. You may also find that Hats make you look older as well.

The final one is a bit more tricky, your hairstyle. Change that to be a bit longer and “scruffy”(think around the ears a bit more) or if you have a good head shape, go short or bald. This could also have the complete opposite effect as well, and further highlight the baby face though.

Bonus bad idea, get so much sun on your face it starts to go all leathery. May have a slight side effect of cancer though.

I think(well sure) that is passenger side, because driver is on the right. And so this picture would have to be taken from outside the driver side to catch the seatbelt.

Yea, earphones aren’t going to make a difference, or maybe you shouldn’t drive with a radio on? Or that the sound deadening in the car doesn’t already block most of the sound outside the car.