Why couldn't Thor beat Loki by himself? Because he had a team member like the Hulk to toss Loki like a rag doll - if you haven't seen the original movie, sorry for the spoiler. In any case, no matter how talented and skilled you are, starting a business alone is going to be difficult. I grew up earning straight A's and winning competitions, so I know all about the power of self-confidence. The caveat is that too much of it can lead to foolish pride. I learned that in my late teens so don't make the same mistake I did. Build a team. Better yet, assemble your own Avengers.
Before you assemble your Avengers, figure out the key areas you aren't an expert in. For me, I'm simply a creative, and all I want is to focus on telling the stories in my business. Having that said, below are the areas I'm not an expert in that I feel are key to launch and run my business:
In addition to these areas, I think it's wise to find people to delegate tasks to. For example, I love producing and filming, but not very keen on editing. I'm very good at it, but it's not my favorite part of the production process. So I'll most likely find an editor to edit my projects while I work on telling the next story.
How you assemble your Avengers is completely up to you, but be wise. It's better to find the right people versus people who are available. If you're going to build a boat then find someone who has experience building boats, and not Cousin Timmy who has nothing else to do. Having that said, the right people must be enthusiastic about the business. Having unmotivated people on your boat are simply dead weights. You don't want your business to sink.
Don't worry about assembling your Avengers right away. If finding the right person takes times, then just wait. In the mean time, it's a good idea to find mentors who are experts in the fields you are not. Take them out for coffee and pick their brains. Who knows, they might even join your team. Either way, don't this alone. Everybody benefits having a Hulk on their team.