Thank you, Laura:
That is very useful information. I study Memrise and I'm through Mandarin 1, which has 389 symbols or words, and Mandarin 2, which has many more. I do realize during my tutorial work that I have not memorized all necessary words for Mandarin 2, but do understand at least 1/2 used.
I also created a custom word set that's not visible publicly in Memrise: This set lets me memorize special words I want to know, regarding topics of interest, my hobbies, thoughts and profession, technology etc. I know these words will come up in HSK 3-6 but I will have them memorized already :) Thanks for the tip!
My teacher recommended Penelope which is another cartoon, and simpler than Peppa Pig, but I told her I would also continue Peppa Pig. I am very pleased that although I only understand maybe a quarter of the words and have to pick through some sentences and look up words, I am very motivated by the progress since before I started tutoring at HSK 1.
Sincerely, Andy