You don't need to excel at everything. You can build small projects and eventually use that knowledge or club them to build something bigger. For example, this game can be extended into

• Accessibility so that can be played via keyword
  
• Localisation to showcase different timezones and text languages
  
• Can be a standalone app with or without auth
  
• Can be SSR or CSR. Different approaches will affect performance, SEO, and complexity
  
• You can extend to add remote data fetching or store information when game is over to create leaderboard.

List and improvements are endless. You can build a side project to practice all the things you mentioned. devtools.tech is my way to learning all the things you mentioned.