When journaling seems like a large daunting task, simple daily journaling methods can make them completely doable. They can also help you work towards longer journaling times, more profound journaling themes, and better writing habits.
To answer the burning question: What point of view should I write my story in? That depends...How do you want to present your character's story? Should the protagonists tell their own story or should someone else? Is your character's story best told by a reliable narrator/protagonist or by an unreliable one for an emotional pull?
Google Docs, Microsoft Word, and Reedsy's Book Editor are great writing software picks for the beginning of your writing career...it's a great place to start if you know nothing about your writing career except that you want to start...