[lojban-beginners] Questions re: proper translation/syntax

[Gene Mosley <lojban@mosleyfamily.org>]

Hello again.

Please help me out with the following.
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[do ca tavla]
you present-time talk
- or -
now you're talking

or is there a better way to express this sentiment?
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This one is more complicated.
In a mini-lesson on lojban.org it says that:

[da tavla ta] = someone talks to that person

[do tavla zo'e mi] = you are talking about me

[zo'e tavla mi do] = someone talks to me about you

So, does [da tavla mi] = [zo'e tavla mi]??

Are they both = someone talks to me??

Both [da] amd [zo'e] were used for "someone".

I thought [zo'e] was like a place holder for sumti
that were not important.