No you cannot arrange your shop display yourself the standard setting is 'Best Match' decided by eBay
You could use subcategories below your main categories such as Batman,Spiderman,Star Wars etc to group items but that is all.
Also to sell the items you have listed on eBay a business account is required and you must accept returns,multibuy offers are being removed from private sellers next month.
An eBay seller must register as a business if, for example, they sell items they have bought to resell, they make items in order to sell them, or if they buy items for their business.
https://www.ebay.co.uk/help/policies/selling-policies/business-seller-policy?id=4710