Never try to speak Anime Japanese. Be natural. And by natural, I suggest you go watch some Japanese drama or game shows.
There's an app called 'Learn Japanese Offline' by ufostudio on the Android PlayStore. Download and start using it. It's better than Duolingo.
If you want to learn the letterings, I can send you a pdf that you need to print for practicing strokes.
My niece is learning both Korean and Japanese this way and she improves her skills day by day. It's easy for her cuz she's also a weeb and watches k-pop/drama everyday.
If you want to improve your Japanese from a real Japanese person, try
yutaaoki.com Most of his lessons are video-based and free, easy to understand and quick to learn.