Are the following sentences natural and acceptable?
Although I tried out many new methods to mix colors, I didn’t do it well. Consequently, the work became an awful one. Nevertheless, I was satisfied with it because it was my first work of watercolor painting.
It's okay, but not completely natural. The last one might end "... because it was my first attempt at painting with watercolors."
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.