If you strictly want free, legal sheet music to practice similar skills, you can look for 18th and 19th-century educational piano music that has entered the public domain International Music Score Library Project (IMSLP)
Finding a free PDF of copyrighted educational material like John Thompson’s Modern Course for the Piano: Grade 2 If you strictly want free, legal sheet music
: You can purchase a legal digital version for approximately $8.99 to $10.99 Hal Leonard Barnes & Noble Kindle Edition : Available for immediate download on Physical Book with Audio If you strictly want free
The John Thompson Modern Course for the Piano (Second Grade Book) If you strictly want free, legal sheet music
Introduction