The Church doesn’t “put” people in Heaven. God does. Historically, the Church set criteria for considering a person go be a saint, IN ORDER TO CURB the kind of popular enthusiasm that wants to venerate Jack Kennedy, Elvis Presley, Princess Diana, and you dear Aunt Maisie and Uncle Cliff.
To be a “canonized” saint, there are supposed to be actual miracles, which would serve as signs from Heaven attesting to Divine favor, as well as evidence of a life of heroic virtue.
I notice that non-Catholic funeral services pretty much award instant canonization to everyone upon medical proof of death.
I rather think humbly seeking confirmation from Heaven to be a more prudent course.