I went back to the Shark videos and I see the instructor had explained the “Decimate” modifier (I had forgotten about it). I tried it and it works better for what I want that the Remesh. Remesh was not being friendly with the parts of my model that had a high level of detail (and “adaptivity” was giving me artifacts in the less detailed areas).
I haven’t tried retopology as I saw Retopoflow is a paid addon, but I’ll take a look at how it works anyways.
Thanks for your response!