There are many steps for this guide, as Cant Let Go is notorious for being the hardest thing of all time, besides getting my cat to stop biting my headphones cord.
Step 1:
Beat every single other level in the game for practice, easiest step, might take a decade or 5.
Step 2:
Dedicate a year to 1% of the level until you have perfected that percent
Step 3:
Play Elden Ring and beat it no damage
Remember to take breaks every century!
Step 4:
Give up and beat Silent Circles Unnerfed instead again because you beat it earlier

If this does not help you idk what will.