When you catch yourself asking “who am I to try this?”, flip it. Somebody’s going to. Why not you?

That question assumes there is a qualified person somewhere who holds a right to the thing you do not. Usually there is not. The people already doing what you want started with roughly the same mix of nerve and ignorance you have now, and picked up the credibility afterward by doing it. Asking about your standing is a way of delaying the part where you find out.

Change the question from whether you are allowed to what the first step costs. Then pay that. Qualification gets assembled on the way rather than collected in advance.