Hello Aviz,
I believe we are already in contact via e-mail.
As a non EU individual, you can buy shares in a Spanish company and get your profit from it, but not be a company director nor have a self-employed activity unless you apply for a self-employed work and residence permit. If your intention is to carry out a business activity, I believe you will have to apply for the Self-employed work and residence permit.
A self-employed activity means that you will pay your own Social Security as a self-employed individual that does not work for a third party and is not subject to a job contract. As a self employed individual you invoice your clients/customers for your services. A company Director must be registered as a self employed individual to manage his business, hire employees, etc.
If you manage the store and work there you will need to register as a self employed.
Regards,
Bookmarks