I have to wonder if my luck in this'll be terrible. I don't have any SRs yet. But the world has a way of surprising you. Or disappointing you. I mean, I must've had a 6% draw rate for 5* gear in FF Record Keeper (the average is supposed to be 10-13%) for the first two and a half months of playing it, then I took a vacation for a month and when I came back and started rolling again I got a TON of good stuff in a very short period of time.
Haven't played much, though. Today's been really, really awful for me, health-wise. Well, some days you eat the bear, and some days the bear eats you.
A few things you can keep in mind: 1) They are very generous at giving out free stuff. The most recent event (10million downloads) gave a grand total of 70 (!) free pulls during x2 SSR Rate.
2) Events give out a bunch of SR/SSR stuff. Be sure to do them! As mentioned, the game rewards you for grinding stuff. Even my friends coined this term "Grindblue". Haha. Well anyways, it's pretty fun for me.
3) SR Event characters were more than suitable enough to carry me a decent chunk of content. Story mode also has SR characters so try to progress on them. I was lucky for starting during Cinderella Collab so I was able to get a decent team. Right now, Street Fighter Collab is coming and they give out bunch of characters as well! Go for it!
Now I've got Ryu and Rashid chilling in the back of my party ready to build up loyalty. Rank 15, got Katalina, Rackam, and Io, but it doesn't look like I can do anything to level-break them yet since that's on another day of the week. I'm at 1650 Crystals, so that's 1350 to go for a 10x. God, I hope I get some of these hot girls I've seen fanart of on Danbooru.