Fi types in general would come off as discrete (I'm not sure who would be more though).
As for literature, Lenore Thomson's book is good. Interestingly, she divides chapters by dominant function (and then breaks it down into sub chapters). ESP/EFJ/ENP/INJ/IFP/ITP/ISJ. A couple of other books I've seen do that too. Point being though is that ISFP/INFP have a lot in common, just for being Fi dominant. So it's probably not unusual to be confused.
As for the functions/actions.. Some things would come harder than others probably. IFPs wouldn't be enthusiastic to develop Te. I think schooling, technical skills, and hobbies (like reading or games) all indirectly lend to Ti though. Although it would not be an IFP's natural choice..just something to draw upon. Additionally, depending on how you were raised, you'd get forced to do things that required Se (kind of like those stories of kids being taught to be right handed). For example, my dad wanted to make me live out his dreams of being an athlete, I think. I remember the first organized team I joined was in soccer. Which was a disaster at first. I was the kid who ran the ball the OTHER way, thinking I was some big hero.."I'm totally beating everyone!" Umm, no. But anyways, I got better.