I am exploring video mostly for wildlife. I am pretty much tied into the Nikon ecosystem. Any thoughts on a camera? I have a Z7ii with 24-120 and 100-400 Z lenses with an 800mm on order. No intention of becoming a YouTube star, I just want something serviceable.
Your gear is fine optically. I would start with what you have.
You might want to consider a hotshoe mounted Shotgun Microphone and feeding in audio in. The KEY is supporting the camera/lens and smooth panning. I use a pan tilt head when I use a tripod.
I used DaVince Resolve 18 (the free version) until I upgraded to the Studio version -- once you learn how to plan, shoot, assemble, edit, colour manage (this is both hard and simple) and transitions, add audio commentary etc.... and then other visuals -- video post production is "wonderful" and a great consumer of time. I would not go overboard on resolution or fps for your initial attempts -- this just eats storage and processor capacity.
Spend time on "your identity" and the "look" you are seeking to achieve. Then plan the shots you "need" to tell the story you want the video to tell. I would keep your initial attempts relatively short and work out how and when to include stills and other media in your "product".
It is worth you having an eye on what audience you want to watch the video -- this is essential -- but initially just start out with the basics.
Obvious you can just make some recordings of opportunities as they arise and work out what you will do with them later. BUT -- having done this far toooooo often -- better product comes from spending a little time to plan.
Upfront - Intro (you and the storey you are telling) - - [ - the arc of your storey - ] - - Closing - byline - upcoming etc...