Create Shopify Store

I just register on Shopify I’m just fumbling thru the navigation on Shopify I picked a theme and changed it slightly I want it to be clean and easy to go onto each section

Like I have these sections I want

1. Tshirts
2. Business printing
3. Promo products
4. Signs/lawn signs and banners,
5. Graduation signs
6. Sticker shop
6. Arts and crafts