Getting the timing on the pendulums is a pain, I had to watch a walkthough to get through it. There are a lot of good walkthroughs on YouTube, I had luck with HowToSouls.

There is a secret bonfire when you get near the end by the giants that throw explosives.

Good luck!

Did you manage to finish Sen’s or do you still need help?

I got through ages ago lol

Have you beat the game yet?

No lol. I beat BoC and made it to 4 kings then lost my motivation

^I had luck with havel's set and the crest shield against them.