newbiepilot
you are already starting off on the wrong foot. do take the advice and talk to a CFII.
but I will GIVE you this:
words are important. you cannot properly understand VOR or NDB tracking without understanding the words.
A radial only exists FROM a station. You already have the 300 degree radial and the 120 degree radial confused.
You must know the following:
Course
Radial
Bearing
Heading.
They are not interchangeable, so, start at square one.
I think you should also try to understand in your example you are on the 250 degree radial flying outbound away from the station.
You want to track TO or inbound to the station on the 120 degree radial.
Well you are really lost.
But if you meant that you wanted to track inbound to the station on the 300 degree radial, your course will be 120 degrees. BUT YOU WILL BE ON THE 300 degree radial until you pass the station and then and only then could you do anything on the 120 degree radial.
So get your terminology right. Take the time to draw things BY HAND on to a piece of paper.
I won't' even talk about your second example because you need to start at square one.
think of a radial as the name of a road and you can go one of two ways upon it.
and right now I don't want you to leave the parking lot!
PAY for a CFII to draw things out for you.