Here is an excellent starter blog by Sumo. It is a bit of a long read, but it touches on major topics from building to launching a store for beginners.
Welcome to the Shopify Community. I'm happy to suggest a some free learning resources for you. Have you heard of Shopify Compass? Shopify Compass offers various free video courses in a wide range of topics from store setup, to marketing, to logistics and more. Since you're just getting started, I recommend taking:
We have great help documentation on our Shopify Help Center that covers starting and running a Shopify store. To start, I recommend following our General checklist for starting a new Shopify store. Each item on the list has a link to the relevant help document with further steps and details. You can check off each item as you complete them to help keep track of your progress.
I will also share a link to our YouTube Help Center. This is a great place to find free video tutorials on different topics. Following a video tutorial can be helpful when you are first getting started as it can make it more clear what each step will look like. For example, I recommend watching:
Lastly, there are a lot of answers found right here in the Shopify Community. Try searching for any topic or question you have; with over one million posts, there is a lot of great information here. You can always ask another question if you can't find what you're looking for.
Let me know how your setup and learning goes!