Teloi, that is good advice but please remember to start your responses to other learners with "Not a teacher". Also remember that we start a sentence with a capital letter and end a sentence with a punctuation mark.
Oh, that's a beautiful 'double restriction'.:-D
It has nothing to do with the OP's question, but please allow me to ask a question here.
Is it natural to say 'No one that has promised a shortcut to learning a language that I know of has delivered'?
Thank you.