Jesus will SOON be personally “granting us all the privileges and rewards of a new life with Him”. (1 Thessalonians 1:10) Ready for this?
So you want to go to Heaven. Jesus promised Heaven for those who follow Him. He does not include anyone else in His promise. Other religions make promises they can never keep. Do you want to entrust your eternity into the hands of puny humans? Only Jesus saves.
Salvation is free in the sense that we pay no money, pay no church, pay no official, don’t have to “clean-up your life”… in order to accept God’s salvation. But salvation is not “free” to anyone: it will cost you dearly.
I’ve got that joy. Do “you greatly rejoice”, and “delight with inexpressible and glorious joy”? You can. But “you must be born again” (Jesus said).