Masturbation isn't a sin. I recommend you check out this article. It's a good read and makes very compelling arguments:
https://biblicalsexology.com/does-the-bible-condemn-sexual-fantasy-masturbation/That being said, you will go to hell if you don't believe on Jesus Christ. Plenty of people think that turning from their sins (AKA trying to stop sinning) is the key or half of the key to heaven, but they are wrong. And guess what: a lot of these people are trying their hardest to not jack off, but they're just gonna end up in hell, if they don't get saved.
