Hi! i need to make an order form that is just 2 selections

Hi! i need to make an order form, so that´s just 2 items to fill:

1) Product ID, I need the user to select between the codes i defined for my products, how can I do? they´re almost 50 products, so the dropdown is not an option...

2) quantity, i need this is just a POSSITIVE number

Thanks!

Instead of using a drop down field, use a single or multiple choice field.  For quantity, a number field would work.  If you want to set up individual products, a payment field would allow for doing so:

https://www.jotform.com/help/47-Order-Form-Basics/