Training in electronic commerce – Entering electronic commerce

Hi, I've done some independent eCommerce, but I'm trying to formalize this with some course or qualification to finally be able to enter a career.
SEMrush

We are currently looking for recommendations for courses in the UK, preferably online or remotely. Does anyone have any suggestions and how is the employability after doing these courses?

I should add that I'm actually a Music graduate, but I set up online stores and websites (WordPress with Woo Commerce, some experience with Amazon and Shopify). Would I also need (?) To look at a Google Analytics / AdWords course potentially? Good number boy, solid Excel experience and capable of data manipulation.

I appreciate any advice or comment!