I haven’t played Silksong, but if the previous game, Hollow Knight, is anything to go by, it is very much Souls-like, which is what you’ve went through: if you lose to the boss, you get whizzed back to your last checkpoint, and all enemies, excluding special enemies, along the way get revived.

Again, if the last game is anything to go by, there should be various checkpoints all around, but you have to look around as much as you can with the current movement methods available to you. You’ll probably want to look for the closest possible checkpoint, and learn each enemy’s patterns to either avoid them, or defeat them without taking damage. Bosses are essentially just much bulkier enemies and have more moves in their moveset.

Souls-like games boil down to learning enemy movesets, finding ways to survive, and improving your timings to improve your survivability, while chipping away at your enemies until they die, and maybe along the way you’ll die a lot of times. It’s definitely not everyone’s cup of tea, but this sort of game gives many strong satisfaction.