You can edit your subscription price by following these steps:
Head to settings - creator settings - Subscription
Edit the ‘Price per month’ to your new subscription price. This can be from $3.99-$100
Click ‘set price’
What will happen to your existing subscribers?
When you change your price you have two options.
Existing subscribers will be prompted to opt-in to your new price. Until your current subscribers opt-in to your new price they will auto-renew at your current sub price.
Force current subscribers to opt-in at the new price (this will disable their current auto-renewal).