I fell into that waiting for everything to be perfect trap. I don't know if I regret it or not at this time but I did start my comic last 2011. I burned out and focused on just getting better with my artwork because I wasn't satisfied with the quality of my drawings.
Last night, I was working on my next page and all I could think about is that I will never finish this story because I have a lot of content to write and wondering if I wasted 6 years just improving. Personally, I wouldn't call it a waste but at this point, I shouldn't stop if I want to finish my comic - imperfections and all.
This is what my comic used to look like and its current version. I retained 4 of the 8 pages I did six years ago.
Other advice/lessons I took to heart over the years:
- Composition and values are very important (as @ScampiCub already mentioned). If you are already coloring , to check if you have correct values in Photoshop or similar tools. Put a black layer on top of everything and set it to color blend mode)
- Use references whenever possible
- Strive for improvement not perfection
Also this video is very helpful: