Could use some guidance or advice on Flower Gems please.

I started FKG about 2 weeks ago and was enjoying it until yesterday. I decided to attempt to collect 50 gems for a '10 + 1' pull. I got there, but I exhausted what I think is all my available sources of gems: Week 1 login bonus (worth 5), Special missions (worth 2), and 1 from all the lower-level missions that are smaller and easier to 3-medal.

So now I'm back to zero, and I don't see where the gems are going to come from. Week 2 login bonuses are only 1, special missions don't offer gems when they come back the next week, and the normal missions (I'm at about 12-3 now) take lots of tries to 3-medal and my team can barely clear them anyway.

Where do you get gems from here on out? I don't see it. I've read posts on this forum from people that say they've done 5-7 '10 + 1' pulls. Where are those gems coming from?

My '10 + 1' pull was a disaster, almost mathematically impossible actually. I'm on the fence on whether or not to give up on this game; the ease of getting back to 50 gems and give the game a chance to redeem itself will help me decide. Thanks.