Confusion about switching class

I understand that if I want to play a different class I can do so just by switching weapons.
I am new to the game and currently a level 10 runemage.
If I switch to the weapon of a different class will I become level 1 in that class?
Will I lose the progress I have made on my current class, or can I switch back by equipping a wand and resume playing my runecaster at level 10?

Thanks!

You will never lose progress on a class. Each class levels individually of the others.

So yes, you’ll go back to level 1 in the class you switch to, but you’ll still be whatever level you are on the other class

Great! I saw someone doing something cool last night and I want to try it!
TYVM for the info!