Eunice here from Shopify, thanks for posting, and welcome to the Community!
Congratulations on your new store, how exciting! What will you be selling?
Setting up a store can be a lot to navigate at first, but we have lots of resources to help, and we're also here to support you every step of the way.
A good resource to start with is the free 'Getting Started' course by Shopify Compass. With this course you'll learn the basics of designing your store, before learning how to launch your store, and how to create happy, returning customers. The course is delivered via video in bitesize chunks making it easy to digest, and you also have the option to stop and start as often as you like.
Check out the course then let me know which areas you're still struggling with and we can go from there.