[quote=@Moonshadow]
<Snipped quote by Kenshi>

I plan on doing levels, running this as close to a "usual" game of D&D as possible. Let me read through Multi-classing in the PHB again to refresh memory on how it works, the only time I've multi-classed as a player was in AD&D x_x


[/quote]

Simple: You have to have the specified stats in order to multiclass.