Hi and welcome,
I don't know were you are located, in a PAL region?
The recommendation you've been given, to shoot at 1/50, is correct if you are in Europe but if you are in the US it should be 1/60. It depends on the electrical standards of each country (frequency).
the 24P (and 23,98) is suitable for cine and the web, but if you broadcast in Pal region and DVD it will be 25P, in NTSC 30.
If you shoot 24P and you need to pulldown to NTSC (30), you would first slow the footage to 23,98 and then do the pulldown to match 29,98.
In fact the Canon shoots 23,98 and not 24.
I'm not in favor of this and think that the simpliest way is to accept a speed increment on display.
The shutter speed is important according to your "electrical standard" region, but also do not shoot too fast, (ideally a 24p project would be 1/48 shutter speed, 1/48 = 1/50 ).
But then, if your subjects are not action, you can perfectly shoot at 1/125, but beware if there are moving objects and do not go over that speed. It would remove the blur, and in motion we need blur if not it looks staccato. Your speed should match with the electrical frequency (or be close to). So you avoid banding-pulsing.
I generally use a range of 1/25 - 1/50 - 1/100, in the us 1/30 - 1/60 - 1/125
when you ingest footage in a 24p project, the footage whatever raw speed was, is motion adapted automatically to the project settings.
Some people may tell you to be aware of your main output and choose the frame-rate accordingly, (ex, if you broadcast PAL choose a 25P project) but indeed, more and more people just avoid the pull-down so IMO stick with 24p is ok.
ps: I forgot to mention that not pulldown is valuable only, of course, if lengh isn't an issue. But if you shoot a campaign that has to be 9 sec not more not less and in Europe and north America, you're obliged to do versions so your choice would have to be the most relevant output.(ex, if the american version will likely to be more important, then those settings are priorized)