I've found a lot of great resources, supplies, and articles while starting and growing this business. I've listed a few below and I'll keep adding to the list as I find more articles and information. Maybe something I've found helpful will be useful to you too!
Step two in the Paper by JLee process: At this point in the start up process I (with my mom and sister) had an idea and general concept about what I wanted to sell. The next step was figuring out what that looked like in terms of design. As I mentioned in my step one post, I already had a few designs from past projects that I could edit and use as stationery.