Are these the markings you are referring to?
M18 X 0.6-6H
M10 X 0.6-6H
M4 X 0.6-5H
I do not work with metric units but I would think that all of the above would be thread sizes and you would have to find and use the proper tap drill size (in mm) to create the holes shown in the attached PDF on page 6.
The -5H and -6H probably refer to the fact that it is an internal thread. See the link below as it might be of some use.
One last thing. You paid good money for this course and if you are having a problem I would demand (not ask) that you be given the proper level of instructional help. Saying only that "everything you need is on the page" is not being very helpful unless you spent one whole lesson on how to decipher metric mechanical drawings and their symbols. If you get no satisfaction from the instructor then take it to the next level. Be persistent too.