Not Bad! Thats much better than what I did when I started out.
yes I believe PS is much better suited for processing and blending astro images.
Start looking into luminosity masking techniques both for selective sharpening and noise reduction. Tree sections along the horizon can be tricky sometimes, especially when blending multiple exposures. Luminosity masks using various level adjustments and mask refining is how I personally deal with those situations such as in the section along the horizon in the linked example below.
Longs Peak Milky Way II
There are many good tutorials on youtube. Youtube and practice is how I have learned everything I know about PS but I still learn new things and better tricks all the time. Also I wont lie along with PS a decent Wacom tablet makes all the difference in the world.