Suppose I find A niche and In that niche I find A competator… Now, I find his top organic keywords… Now, if there is no organic keywords ranking of the competator, should I ignore the Competator or the niche… Please explain in detail…
You should be never avoid that competitor because maybe they will start to work on their website due to in the future you can easily note their all data… Note down them for the future and make sure those are a blog website, not a service based website.
Find more competitors. If there is one, there will be many others. Maybe the competitor you found is new which is why he is not ranking now as it takes time.
Try to find more competitors, more keywords, and more niches.
It takes time to find a good niche, especially when you are a beginner.
Research as much as you can, this will broaden you niche finding and selection skills.