I made a tutorial recently, for our automated remesher. It currently puts out triangulated mesh (quad output in progress), so maybe not what you want. But should give you an idea of how it's done. https://docs.rapidpipeline.com/docs/3dProcessor-Tutorials/tutorial-remesher If you manually retopo the lowpoly mesh, you can…
Thank you so much for the detailed response, @Kanni3d. Can you expand on the first and last point: How do I bake with opacity? Can you point me to a tutorial? What approaches do you have in mind to take the fake those holes with AO/materials? I'd highly appreciate it if you know some guide to check out on that, as well. :)