Scanning is something that many struggle on, and frankly, it makes no real sense for them to be struggling on it. If you trained yourself in all the previous lessons and actually stuck to them getting good and shit... Then you should be more then capable of doing scanning...
So what is the method I'll be teaching you? It'll tie into the linking method found in a earlier lessons, as that is a important part of scanning. -Linking to the target.
So I want you to link to the person or thing you are scanning, make sure the link is actually strong, aka, don't make a quick link that you easily lse focus from.
Now then, I want you to split said link into two directions and connect them to both of your hands... As this scanning method will be using those to scan, rather then unreliable sight, as sight can easily be manipulated by your mind.
Once you have done such, stick your hands into the link in a manner of speaking, almost as if you are sticking your hand into liquid to feel it.
Think of it similar to your hand becoming the link in a manner of speaking. This should, if you actually train the previous things, give you a general sense of how there energy feels by manifesting it on your hands.
Now you just gotta work on understanding all the sensations if you managed the above.