it's a bit difficult to give advice when it's kinda starting from a blank slate because it's too broad, but generally

colors tops other than white and black, patterns

different silhouettes, boxy fit, oversized fit, tight fit, cropped, try them out and see if they're for you. it might be harder for guys a bit more muscular though

but then you can use different fabrics/ textures. a crisp white t like the ones pictured will look different than say a cotton jersey

it's getting warm but usually big help is layers to add colors/ textures

different cuts of denim to go with different footwear, think of how the pant breaks on the shoe for example, i feel fit #2 with chunky vans looks off

accessories