Creating tech blog using MERN stack. Help!

I am fairly new to blogging sites architecture and planning to create one in MERN stack.

I am good with MERN tech, but never built something of production level. There is lot of decision that I think I have to take before starting with code.

For starter...

1. What are some best practices to store each of the articles, is it in database(Mongodb)?
2. How static assets like images and videos are stored for blogging sites?
3. Do I need to implement some caching for api calls?

I want to built it from beginning and publish it as I know the tech but systems design is kinda daunting me!

Has anyone faced such challenge? What are your advice?

Thanks for reading.