Blender PS ONE Arms Animator

I'm developing a game in unity. It's an FPS survival horror with ps one graphics style. I'm currently developing my game mechanics but at the same time I would like to have some art job done. I use blender for my 3d models but I am not an animator.

I modeled two arms which are gonna be the main character's arms. I also modeled a baseball bat which is gonna be the very first weapon of the game. The arms are already rigged but you can tweak it as you want, just describe every change or correction you make to the blend file I'll provide to you.

I need the arms to be attached to the bat, I need the following animations, all these are the character's arms holding the bat.

1- Idle
2- Walk Directions
3- Sprint Directions
4- Crouch Directions
5- Jump
6- Attack A
7- Attack B, to perform a combo.

I need the fbx files ready to import to the game engine. I'm willing to negotiate.