You should wait - not because you should worry about YC, but because your discussion of incorporation reveals that you are a noob with respect to those topics.

You should wait - not because you should worry about YC, but because your discussion of incorporation reveals that you are a noob with respect to those topics. That's OK, you wouldn't expect an expert in tax or corporate law to understand your field of expertise, and you shouldn't imagine that you're going to understand their field of expertise by reading arbitrary pages found on the net, even if you read them very diligently or for a long time. You should focus on building your business - chances are whatever you do at this stage will need to be redone at greater expense if you do get outside investment.