Newbie Must Read: What new system did you just buy?

I am new to UW photography but inherited a family member's subal + nikon d7200 with a ton of ports, strobes etc. We talked photography endlessly, and she was a birder and nature photographer topside (has a nice 400mm zoom for the nikon above water).

I always pledged to get certified and try diving but I don't think I can swing the commitment this setup brings to the table, esp with new kids and whatnot- while I'd like to keep it as a memory of her I may flip it and just replace with a camera I can then hand down generationally. IDK anything about UW gear though, so I'm reading up on the subal housing and all the crazy ports etc it comes with.

I went with the Sony A7RV and an Ikelite DL housing w/DS 161 strobes for TTL options. Lenses are Canon  8-15mm fisheye, Sony PZ 16-35mm/24-70mm and 90mm macro.  Looking forward to having all the bits and bobs to complete the setup and get it into the water - even if I have to crawl on my belly in mountain hotsprings!

For my upcoming trip i want to start with UW video. I already had a Insta360 One R camera (with the 4K wide angle mod and the 360° mod) and I'm a big fan of 360° video/photos so getting the underwater housing for both lenses was the natural first step:

Then i thought about the light. I bought a clone of the Divevolk dual handle try (which is probably a clone of a nauticam tray).

Note that on the picture from AliExpress the handles are mounted facing the wrong way...

Then i bought ball clamps

and two lamps: A used noname wide angle lamp that needs 4x 18650 batteries (can anyone identify it?)

and a small Wurkkos DL07 fill light.

I noticed that the negative buoyancy of my setup was around 820g so i bought a 10-inch 80mm diameter float arm (-872g buoyancy) to be mounted horizontally.

That's it for now! Hehe...