Hello,
I do custom T-shirt designs for POD platforms like Merch by Amazon, teespring, etc...
I'm looking for a strategy to find low competition keywords (preferably, KGR keywords) in low competition/ undiscovered niches.
I use paid tools like KWfinder, Semrush and Ahrefs, but each time I find a keyword, even though it would have low search volume, but I find it saturated with other competitors which makes it hard to rank for.

What's a strategy/ black hat method to efficiently search and find low competition keywords for such niche?