>>2299678>I'm not trying to be stupid on purpose>The rest of that postChrist anon.
The only thing that matters from gacha are SSRs as they unlock the fucking guide and have stats worth using. Event SRs are okay to use for spamming the event. They give a bonus to points/drops: to get rewards faster. Don't do the gold-lined event matches for now or only once per rank, they're the ones that cost a ton of FP for no reason and only give zack money on completion. Main matches are for getting gravure panels finished.
You need to unlock a third girl because this is written in the fucking guide. You'll be filling pools full of FP Drinks soon enough but don't expect to do so just yet.
Japanese lesson for the day: 報酬
You'll find it somewhere at the bottom of the event page.