One step in my journey as a trader was finding out more about my style. I realized that I was a relatively impatient trader; i.e. I want the trade to work almost immediately or else I'll review the setup and potentially try again in a better position with more information. Hence, I classify myself as more of a scalper, looking for areas of momentum that typically arrive due to a short squeeze from an aggressive buy support.
Part of the challenge is that I may need to 'test the waters' a few times before finding the right spot for the trade. I know very often that I'm in the right area, but the r:R has to make sense and should resolve itself quickly in order for my edge to be realized. So for me, taking stabs and building a position once it's confirmed to be working is a more ideal strategy for me.
You mention the balance between overtrading and commissions along with not having a true edge; one bit of information to try and define is which strategy that you trade is leaving the most money on the table. Assuming you're looking at lots of stocks and trading lots of patterns/setups, along with the scalper-esque Average Win Value, it may be ideal to find the setup that has a high occurrence rate (so you find trades each day), a high success rate for yourself (so you can achieve goals consistently), and has a good risk/reward based on your criteria for entry (so it reduces # of trades before hitting goal). If you can identify this, challenge yourself to hold for a larger target and bring the Average Win Value amount up for that setup alone. Rinse and repeat for two-three setups and now you have a trading edge along with reducing the clutter that is 'working' but is reducing your mental capacity for the A+ setups you've refined.
Once you begin trading live, the process of refinement and improvement should be constant, where your old setups become better and you build setups for different market conditions.