Hey Everyone,
First post for me here. I did search a bit and couldn't find this question answered, but perhaps I missed it

I've played the piano for 17 years now, 12 of them with lessons. My major focus was on playing classical pieces. However, it's always been of interest to me to brush up my sight reading and improv skills so that I could help out in a church someday.
That day has come -- my wife and I found an excellent, small church, and they have been trying to find a pianist for a year (someone has been filling in, but she was meant to be temporary). Unfortunately, my sight reading skills are pretty poor.
For a random hymn that's not too complicated, I can play through it fairly well after a few run-throughs. I rarely glance down at my hands, and I'm starting to practice random hymns every day now.
My question for everyone is are there any tips/suggestions/books that you would recommend to help me drastically improve my sight reading skills? Tangentially, I also want to get tips/suggestions/books on how to improvise when playing from a hymnal. I'm jealous of people who can do that

I consider myself pretty creative, but improv-ing on a piano is much harder than on a guitar/bass guitar, something I already can do fairly well.
Thanks in advance for any suggestions
