How to play Fiora?

So I've been interested in Fiora and her playstyle for various reasons, but I can't seem to pick it up like I do with a lot of other champions.

Her precise, slow AAs (initially) make it hard to farm (from my point of view), and trying to hit Vitals whenever the enemy laner comes in to harass them away feels dangerous early on because Fiora's squishy until she gets her items.

Also, I can't seem to time her Riposte for the life of me, but then again, it's so incredibly fast sometimes I just don't notice the "Parried!" flash. On the occasions I do get a parry off, it doesn't really seem to help as they just continue to attack, and I end up falling behind in CS and gain a lot of deaths. I've looked up different guides for certain combos and tricks to Fiora, as well as videos, but it's really difficult to pick up, at least for me.

Also, on the occasion I do get the ult, I either end up getting surrounded and killed fairly quickly or end up just using it to take out single targets rather than help with the heal in a teamfight. On the note of the heal, I almost never get all 4 vitals, and on the chance I do, it was just lucky positioning/team help/spamming, rather than actually knowing what I was doing.

I understand this will probably get downvotes because Fiora's really disliked by the League community right now, but I'm honestly just curious and interested in being able to simply play her without completely failing early on and through the rest of the game. If any Fiora players could offer some tips, that would be greatly appreciated.

[slayer-jinx-catface]