Im new to the game so i don't really understand how classes work. I know that i need to be level 30 and level 15 in another class in other to become a white mage.
MY friends started to play the game and another person want to take the role of white mage so i decided to create a archer.

I want to know whats better, change class on my conjurer level 30 to be an archer or level up my new character?

Also

If i change classes on my conjurer into a archer will i be able to become a bard?