start with basic flying.
Your basics are very good. All exercises review. Keep using systems you are used with. If no problem dont change.
Start QDM on OKT
Remember 
QDM=Heading +-relative bearing.
Relative bearing is on the ADF indicator top of the needle left - or right +.

QDR = heading +- the backend of the ADF needle, relative bearing.

For small correction once on the QDM or QDR you can use simple rule.
FOR QDR actual is more steer less
FOR QDM actual is more steer more