Realise that entrepreneurship is a marathon and not a sprint. What it means is that you should be in it for the long run. Building a business takes time, effort and discipline and if you cannot work and wait, then you should get a job.
After all, positive first impressions are key—you’ll want to make a great and positive one on interviewers. Part of how people initially assess others is how they appear, making dressing for success more than just a matter of vanity.