Guys, I get it - you finally found this group here and want to dress better immediately. But what completely shifts your looks/appearance is the shape you're in. Even if you're just wearing a plain and fitted black shirt and trousers it will look good and attract glances.
I'm begging you to take 12-16 weeks to get in decent shape first before you buy a new wardrobe. This saves you from having to buy twice AND will boost your confidence more than any suit ever will.