Not weird. Unusual. When I think back to high school wearing a suit would be completely impractical. Most high school guys don’t even own a suit and grad is the first time they buy one if they don’t rent a tuxedo.
But it’s your choice. You can wear anything you want. Just be aware that everyone is not going to react positively. You are at an age when cliques and fashion dictate what people wear. Suits are usually outside of the approved dress code.
But if you wear it with confidence and don’t pay attention to naysayers you can pull it off.
We recommend you to check Bespoke Tailor Vancouver once and compare with other and you will see the price and quality difference.