I am not in food or pharma...so my answer should be taken with that in mind.
My living room complies with ISO8...and has a carpet, upholstered furniture and curtains...and four potted plants.
Revisit the
requirements needed, and any special requirements that may be needed for Medical. Base your course on that, not hearsay.
I ran an ISO7 cleanroom for over 10yrs...(electronics, not medical) and we had wood tables, aluminum fittings and equipment and a few computer laser printers in there...and no head coverings. Passed recert every time with no issues.