Accrescent is also good. Zapstore is best.
"There is no spoon"
I was able to set up a new GrapheneOS for a family member without ever touching droidify or obtanium.
First step, download nostr:nprofile1qqs83nn04fezvsu89p8xg7axjwye2u67errat3dx2um725fs7qnrqlgpz9mhxue69uhkummnw3ezuamfdejj7rn7acz APK directly from their github repo (use Vanadium for this).
Once zapstore is installed you literally never ever have the need for Obtanium again.