Do not fret, learning Japanese can be a frustrating as well as fun experience as it is a new culture.
Anyways, what you can do after learning hiragan and katagana is lots of things. I'll list out what helped me:
1) listen to japanese music: helps out your pronouciation
2) grammar books: get started as someone posts previously, it will be useful. As other people mentioned, don't rely on all romanji book as it will hinder your character recognition
3) look at drama: This is most rewarding, not only you get to see the culture, you learn it as well.
4) VOCAB'S: this is so important; how can you talk without knowing words. Start from the basics.
I think I cover the five senses, haha~
Ganbarou~!