In terms of editing software.
A list of the best softwares (have dabbled in a lot of software due to my background):
- Sony Vegas 10, 12 or 13
- Adobe Premiere Pro CS6 (or CC, if Mac)
- Adobe Photoshop (for captions and still image text etc.)
- Adobe After Effects (good for text and VFX generation)
- Audacity (free sound engineering software)
- Adobe Audition 3.0 (a sound engineering software)
- Final Cut Pro
- Microsoft Movie Maker (free, not as bad as people think after you learn the interface)
- Cinema 4D (3D VFX editing software, for fancy text and intros etc.)
- Fl Studio 12 (for generation of sound and music, used by start out composers)
No idea what your budget is so I listed a few there. If you research into each one you can obviously choose one that suits your situation. Most of them have free trials anyway.
Also, you may want to have a look into the legality of recording and uploading public softball games. There may be a license restriction in the states and legal complications - not sure (as I am Scottish).
In terms of the channel itself, sticking to a snappy name that is easy to remember is always helpful. Another thing you may want to consider is high quality branding and consistent branding (logos, banners etc.) for your channel opposed to a photograph as your channel logo image and the close up of softballs. Decide your name and stick to it, branding your logos and channel art accordingly. It helps establish familiarity with subscribers and viewers which can lead to more dedicated followers of your content.
In terms of channel organisation, you may want to organize playlists for certain types of content on your channel. The more organized your channel looks and feels, the more professional it will seem to visitors (and potential subscribers).
Hope this helps a little? Any questions or anything just shoot me a PM

happy to help fellow creators any way I can!