Needing some guidance

[Chrissfishes01]

Hey,

Similar to my thread in the Beginner's Photography forum, this is just something I'm wanting to get some tips on. I'm using a kit lens on my Canon EOS RP, and wanted to get some decent footage of a new aquarium I set up. A lot of the subjects I wanted to cover are tiny, and I was already at maximum zoom on my lens, so I tried recording in 4K and zooming in during post. I wanted to get a few opinions on what you guys would have done instead (if anything), and maybe some recommendations for a macro lens that would work well for this application. Any other suggestions or tips are also welcome - I'm very new to all of this, so I'm trying to soak up any information I can! Thank you!