If your goal is to play this piece you must learn to play easier pieces first. It's easy to find information in the internet about grades/levels (basically a system where pieces are ordered by their general difficulty level). Playing scales and chords won't be enough to develope the musical language skills you need to play advanced pieces, although they help in the process of learning to play and understanding how music is constructed. You don't have to play everything graded 1 to go to grade 2 and so on, but you will need to learn quite a few easier pieces before you have enough experience to play pieces like liebestraume (which is something like grade
properly. A skill like playing the piano usually takes years to develope, so be prepared to enjoy the process. Trying difficult pieces too early and without assistance may even cause damage to your playing tools (hands).
And if you really want to learn to play it to high standard, best to get a teacher.
Topic: Absolute Begginer