Configuration of Inventory and order Managment

I am not sure about configuration of Inventory, and it is Modern Kitchen and had organized categories as below:  

• Prep Tools & Essentials: Chef's Knife, Small Knife, Bread Knife……., Cutting Board, Cutting Board (Premium)…..
• Cookware & Bakeware: Stainless Steel Skillet, Stainless Steel Skillet (Premium), Sauté Pan, Small Saucepan…..
• Cooking Tools & Kitchen Utensils: Spatula, Stirring Spoon, Slotted Spoon, Tongs……..
• Appliances: Immersion Blender, Immersion Blender (Premium), Kitchen Scale…….
• Other Kitchen Essentials: Food Storage Containers, Food Storage Containers (Premium), Aluminum Foil, Parchment Paper

1. How should I set up about posting, Item Class, Chart of Account, Define Availability Calculation Rules, Inventory, Sales, PO?
2. Do we set up depend on organized categories or each Item of product?

Thanks so much for your help and support