
80% or More of what you fear will never happen...
My product is stupid. Maybe, but give it a shot. You might actually get compliments. If you need to improve it, you'll get that feedback too.
I will lose my shirt on AdWords. You might lose some, but don't open your entire fortune to risk. Try a reasonable test or tests and track. Plan to lose a little to learn a lot. The data you gather will be more valuable than the next product launch.
My sales page sucks. Could be, but put it out and see, adjust, fix, move on.
My family will laugh. They just might, but not for long if you start making money. You might even find family members interested in what you do.
I don't know anything worth money. Reporters don't know how to do anything but report and they make a good living. Can you research and gather info on a subject? I'll bet you can.
My tech skills are lacking. Do your best, then get help from pros. There are thousands out there willing to help for a fee, some for free, especially advise and especially here.
I will get sued. Could be. Chances are you won't, but if you do it right you won't lose everything even so.
So and So is so much better, I can't compete. There is almost unlimited opportunities in every niche. Change the color, change the format, change the angle , do it different. People buy not one, but many of the same or similar products. Is there only one Golf product? Only one dating product? Only one hamster product? ( ok maybe just one of those by Kevin Riley)
nothing to see here.