ok let me disect this for you.hajimemashite, Ogenki desu ka?
I think it says hello, and how are u
Is that right
hajimemashite is a first time greeting literally meaning 'it has begun'
o-genki desu ka......
'o' is a formality for the sentence
genki means healthy but can be used in other ways.
you would ask someone in japan if they are 'genki' unless you really want to know.
at least that is what i was told.
'desu' means is but can be used in all sorts of ways such as: kireikoori desu = it's kireikoori.
'ka' just make the sentence a question so it is the equivalent of a question mark.
just remember that ogenki desuka does not equal 'how ya doin'?' and expect people to tell you how they are actually feeling.