Start from a sheet someone has already argued about
Each of these is a real schema, not a picture of one: press the button and it exists in your account, with every field, type, and rule already set. Change any of it. The point is not that these are right for you, it is that a blank sheet is a bad place to learn what a type is for.
Vendor price listOne row is one product a supplier sells us, at a price.8 fieldsSKUtextProduct nametextUnit pricenumberCurrencyone ofMinimum order quantitynumberLead time (days)numberEffective fromdateDiscontinuedyes / noInvoice line itemsOne row is one line on one supplier invoice.9 fieldsInvoice numbertextInvoice datedateSuppliertextLine descriptiontextQuantitynumberUnit pricenumberLine totalnumberCurrencyone ofTax rate (%)numberInventory countOne row is one SKU counted in one place on one day.7 fieldsSKUtextLocationtextCounted quantitynumberCounted ondateCounted byemailConditionone ofNotestextProduct catalogueOne row is one product you list, with the fields a storefront needs.9 fieldsSKUtextTitletextDescriptiontextPricenumberCurrencyone ofCategoryone ofIn stockyes / noImage URLurlProduct URLurlNew hiresOne row is one person starting, and everything payroll and IT need on day one.8 fieldsFull nametextWork emailemailJob titletextDepartmentone ofStart datedateEmployment typeone ofManager emailemailLocationtextExpense claimsOne row is one expense somebody wants paying back.9 fieldsClaim referencetextClaimant emailemailExpense datedateAmountnumberCurrencyone ofCategoryone ofDescriptiontextReceipt linkurlReimbursableyes / noContact listOne row is one person you are allowed to contact.8 fieldsFull nametextEmailemailPhonetextCompanytextJob titletextCountrytextConsented to contactyes / noSourcetextEvent guest listOne row is one guest, and whether they are actually coming.8 fieldsNametextEmailemailTicket typeone ofAttendingyes / noPlus onesnumberDietary requirementstextCompanytextRegistered ondate
Nothing here shaped like your data?
Describe the rows you receive, or drop one file you already have, and the fields are drafted from it.