Of course, there are countless things to consider when you want to start a business, and you can find good checklists everywhere.
But the real point to check is if you own the right mindset: 90% of people can't run a business not by lack of skill, but by lack of self discipline.
It's very difficult to be productive when you are your own boss.
So, check this aspect on yourself: without this, all rest is insignificant.