ok, before you decide to do anything as complex as that you should get alot of practice for exapmle... watching tutorials,creating small levels and messing around with the programme.
through time you will get better with the programme and start becoming used to the way things run on it.
I say before you try to make people talk and text popping up you have a week or two where you just practice with the easiest things after that follow this link
http://forum.thegamecreators.com/?m=forum_view&t=82328&b=24
there you will find all the information you need to use fpsc. I recomend you go to 6 and learn about scripting, after you think you know enough about fpsc to get into the more dificult things use the search button at the bottom left corner of the forums and look up things such as "how to make a character talk" , "how to make subtitles" etc.
Hope this helped you,
,Peter Gee
computer cookies are not tasty i found that out the hard way