To Add new producto go to Product > Add New. If you want to edit one product go to all products
Use a product name
Assign one or several categories
Assign images. You can have any size you want, but if you want all them to look similar use this size 700×1050 pixels
If it is a single product, with no variations like size and colour, select simple product, and assign price and stock
If it is a variable product create or assign if they are already created the attributes needed (size, colour…). Then go to variations and create a variation with price for every possibility.
Once you’ve totally finished with one language go to translations, on the right hand side column, and click on + symbol to translate
Translate here. You can use the > buttons to copy text and html from English, to make the process simpler.
Very important, once you’ve finished, mark ‘translation is complete’ and save