Here is an easy guide created by rainwake on how to find all secrets in The Genesis Order V0.47.
All Secrets Location
Heather’s backyard. There’s a possibility you have to find Heather first before you can open the safe. To find Heather, visit Tasha’s sex shop
Hannah’s room, only accessible during the time everyone visits the room. You’ll automatically walk out, but you can walk back in to grab it
Forest. Go up once, then left once.
In the front yard of Heather’s House. It’s under a boulder
Farm Fields. Needs Carol’s Key to open
Farm. Under a boulder
Farm Fields after clearing the weeds
Forest. Go up once, then go right once. Clear the weeds to reach it
Heather’s House second floor