I love the idea of her getting to know the whole set of Marauders through Vee, esp before the reveals, but she almost certainly knew of Jahan on his own because of soccer. She probably uses his platform and listens to the podcast, though she would've hiatused after her injury, and so properly meeting him through Vee would've been a bit of a fangirl moment, but nothing weird on her part. XD
Also Hermione <3 yesssss. Super sad that there's no feasible way for them to know each other besides in passing. We must find some way to change that! I'm hoping we'll get a Harry at some point to bridge the gap, but I'll need to poke at you privately with my ideas for him and if they can work at all with what you've got. :)