There are a lot of things that make a story. A lot of elements that need to come together to make a full novel.
You need characters and setting and obstacles and more.
You also need a challenge.
Or, at least, your protagonist does.
If everything comes easy to your protagonist, keeping your readers interested will become hard. Without any internal struggle, doubts, or stumbles, there is no intrigue. And if all the obstacles that come their way are solved with a little thought or outside intervention, there will be no growth.
Your protagonist doesn't have to go through hell to keep readers interested, but they do need to have some challenge. Otherwise, they are likely to be extremely boring or unlikeable.