You have done well by starting the journey early.Select a good team of like minded people who are able to support your vision.
The challenges you will face are there to sharpen and refine you into the final product you see in yourself.
Do not fear to delegate responsibilities and seek guidance but be mindful of those who will tell you they have tried and failed.
The moment it gets harder ,know that you are at the finishing line.
Finally never forget those who helped you up the game ,if possible do the same on others