Note that it took a year from the time I made a choice to be happy. Before that, I was just miserable, hated life, hated the world, felt people didn't understand me, thought everyone was selfish, blamed the whole world for how I was feeling, etc. Victim in other words.
Understanding you are responsible and have a choice is huge! I'm so glad you've already come to that realisation. It takes as long as it takes and it really is about the journey. My journey is continuing and I'm excited about it.