Good Morning Michel A.,
I am Raman.
We can help you with automate shopify, we already have a plugin which import products from woocommerce to shopify.
So we can modify it so that, you can update the products via a csv.
We can also make it even simpler, whereby you can have a google sheet with all the details. The app will automatically take the SKU and update the values on shopify product.
Our team is expert at this work. We completed more than 20+ shopify projects in recent past.
I would request you to send me a message so that we can get started.
Thanks for reading and considering me.
RamanL