Newbie: I need help selecting hardware

Hello,
I have not started any home automation yet, however, I am in the process of changing a few curtains with motorized blinds/rollers

I will have a custom-made roller because of non-standard dimensions, so, I need to decide on the motor that I will use.
I am located in Europe/Greece and I am looking for solutions available in Europe.

Can someone propose a few motors/brands that I could look into them?

No one?
At least point me to a direction where In can find this information!