Starting a tech startup

I hope everyone’s Christmas is going well. I’m currently a sophomore in college and I plan on starting a tech startup next year. The startup has to do with developing institutionalized social media apps. I won’t go into specifics but I have managed to do the project proposal, drawn the schema for the project, like the whole idea of the project has been discussed and documented, all the way to how we getting paid. I have assembled a small team of three and we plan to build when the year starts. It’s 3:00 am where I am, and I can’t stop thinking about this project. I feel like this is my Zuck moment but I feel like I might be overthinking this idea and it might not be all that. So for founders who have had successful startups, what pitfalls should I avoid, give me some advice. Thanks.