How to monetize a shoe theme account

So I have a decent instagram account with 31k followers - 60% male, 40% female. The theme is specifically athletic shoes (although I'm willing to expand outwards and capture a larger audience). I'm having a hard time thinking of ways to monetize. It seems like a tricky niche to really know what people would respond well to. It has pretty good activity, averaging around 1,000 likes per picture. I've thought about selling shoes through it, but I wouldn't even know where to start. Any tips on running an account more like a business? Or account growing in general?

Approach sneaker brands that sell and promote on Instagram,

Pitch them your value prop and why they should use you (you have a targeted audience which would love their product).

Create a ecommerce with brand sneakers, since its specifically athletic shoes, put a few Nikes, Adidas, etc.