I would organise my time differently to leave more time for testing and refinement of the product. The first impression is the most important, so you must ensure it is as pleasant as possible.
Reflecting on my journey so far, I would place a stronger emphasis on balancing work with personal life, ensuring that while I am ambitious and driven, I also nurture my relationships and personal well-being, as I've learned that a well-rounded life fosters greater creativity and sustained motivation.
The biggest thing I would do differently which sounds weird is journal. Write down what you do and reflect. Maybe something you navigated through 5 years ago could help you out today.