I want to expand my handmade artwork selling business trough instagram

I already have a local customer base for handmade birthday cards from organic materials. I want to expand my business on Instagram to reach out for more customers in other countries as well. I need an expert on Instagram marketing to make an Instagram Business account. My main goal is to sell my products directly on the Instagram platform. The customers should be able to pay using paypal or their credit card trough Instagram, without redirecting to any external website. Most importantly, the payment methods should support Sri Lanka.