I have to toot my own horn. :)
After months of on and off (and other hobbies getting in the way), I got my 40-20M Ensemble working perfectly.
As a test, I think it is much easier to use WSPR to test the software/hardware and then move to using SSB or even some other digital mode.
My 1 watt signal is gangbusters into Europe on the Windom antenna. And, it looks amazing in the laser cut case.
So, if you are struggling. Keep at it. We can all work through just about any problem. It is worth the reward.
Now, I am looking at some QRP wattmeters that use the AD8307 chip.