Looks like nice job, it should serve you well. I usually use just a single coat and then reapply as hands/gloves wear down the shellac after cleaning with soft toothbrush, mild soap and good rinse. I believe it was this stuff I have used for many years:
https://www.twilltape.com/heavyweight-cotton-tapes/. Can't beat $12 for 200+ feet. Also pretty sure I have always used clear shellac which give the just off white tape and cotton string a nice amber color.