I'd like to remove the "growl" and the robotic voice saying "nutrient" in this clip. Is it doable considering I have no experience with editing audio?
Yes, you can do it. If you are OK with losing some audio quality you can hard EQ cut the low end. If you want to preserve the original audio well, there are more advanced techniques, but try EQ since you have little experience. There are also extremely good tools to isolate vocals with AI. Adobe has one.