Perhaps I just haven't seen this but...

…are there any maps available that can be used to learn those in Arena and Warzone? Schematics or better yet, walkthroughs unlike those found on the HaloChannel? Most MP layouts are fairly complicated and such maps one could pull up empty in Halo 5 allowing you to walk through them would be great, just as being able to try out the various weapons and vehicles yourself before actually having to use them in-game!

There’s custom games! You can walk around there offline and scout all the maps, and choose which weapons to start with. I’m not so sure you can use the warzone maps on there, but I know you can get on the arena maps.
Besides that, an update will come eventually that will add in forge, which will really let you get to know vehicles, weapons, and maps.

^ yep custom games.

I don’t think Warzone maps are available.

I finally figured that out this afternoon. Funny how sometimes just asking a question leads you to the answer even before anyone replies!

Yeah I want to play warzone in custom games!!! that would be awesome!

YES IT WOULD! I really like those big maps even though Reqs kinda break the game up in a way I don’t think is necessary. But my biggest problem is still getting my aiming down to a controllable method. It doesn’t seem that changing the speed settings make any appreciable difference and so no matter how I set the game up I am still always over shooting! I honestly don’t know how people can be so accurate when I can’t be unless I move slow and aim slower!