Help Wanted with Reflection Replacement

Hi there! First time posting here. I’m currently working on an episodic horror series that needs some VFX work done and wondering if this specific shot is up anyone’s alley or doable at all, ideally within a month’s time. It’s a 40 second close up of an astronaut helmet where I’m hoping to replace its reflection with the separate video that plays right after:

https://drive.google.com/file/d/1Egg84rWaH7MURabbDtMaHiW3Aug6fj-f/view

I was specifically told his effect would be “hellish” to pull off and yes that’s entirely the fault of my bad preparation and poor understanding of how time consuming or annoying a visual effect like this could be. I have zero VFX experience and this is a very low budget personal project for YouTube, but I’m not trying to overextend/scam anybody so if you have any interest (or even just advice) please reach out and lemme know what you think is fair! Thanks for the time!