There are dozens of apps that are designed for learning piano, and most of them can actually listen to what you play and detect if you are hitting the right keys.
Enwere ọtụtụ ngwa ndị e mere iji mụọ piano, ọtụtụ n'ime ha nwere ike ịnụrụ ihe ị na-egwu ma chọpụta ma ọ bụrụ na ị na-akụda igodo ndị ziri ezi.