For Christmas I asked Santa for a project idea, and got 2 instead. Help me decide!

I have always loved entrepreneurship, and want to build my first product in 2019. On Christmas Eve, I asked Santa to give me a project idea. When I woke up the next day, I actually found two worth pursuing.

1. A wiki for startups
   The idea came when I was googling a famous startup's founder and was surprised that he does not have a Wikipedia page. I think a "startup wiki" would be a very cool idea. Founders will have their own bio page. The actual startup's wiki will display its history and growth, how it acquired its first users, etc.

2.Product Hunt for books
A platform where users can write, review and discover books in different genre. From my research, the biggest platform right now is Wattpad, where writers can publish their book and have a community around it. However, it seems to be more geared toward teens. I think a good alternative can attract older and more serious writers. The writers can run ads on their books for revenue or let people subscribe (be a patron) for a monthly fee.

I'd love to know what you think. I am a bit nervous, as it will be my first time trying to bootstrap a side project.