If it's a small app with simple styles and behaviours then you can certainly roll out your own. At a certain threshold of complexity, a React app requires building out your own component library which becomes too time consuming and you'd wish you started off with one.
You make your call for what the end game is of this product.
I see a lot of good self self-development reads above, so here are some books that have self-development in respect to interacting with others as well:
- The Elements of Mentoring: 75 Practices of Master Mentors, 3rd Edition
- I Can't Make This Up: Life Lessons by Kevin Hart (I recommend the audible version which is read by Kevin Hart!)
- Thinking Fast and Slow
- Never Split the Difference: Negotiating As If Your Life Depended On It
- Principles by Ray Dalio