Man up
Go play some Fatal Frame 1/2/3, Silent Hill 1/2/3/maybe 4 even, Resident Evil Remake, Siren (original/remake), Deadspace (impossible mode plasma-cutter/melee only).
By then you ought to be desensitized by jump scares. To truly test yourself go play DOOM 3 to make sure as it utilizes that very heavily.
If you're super cheap, I can think of some doom mods/wads that use jump scares and do so effectively.
Also GS, please post as if you're not some poorly programmed botspammer.