You made the decision.
You’re going to make a game. You’re going to create a piece of entertainment of your own, whether it’s just something for you and your friends to enjoy or something you intend to publish and make available for a wider audience.
It’s easy to get stressed. Even the simplest games can be a major undertaking.
But you’ve made the decision. It’s going to happen. You are going to finish a game.
And since the end result is known, there’s no point in stressing about it.
In the meantime, enjoy the process of getting there.
You are participating in the powerful act of creation. It won’t necessarily be easy, and there will be a lot of detailed decisions that you’ll make along the way. It might take longer than you expect. You might get sick of it before you’re done. Game development is real work.
But try to have fun with it. You know you’ll get to the end result eventually if you keep moving in the right direction, so makes sure you enjoy the journey.
Then make sure to tell us all about it. B-)