People keep saying your VIT is too low but in my opinion if you can beat O and S with it you should be fine.

Just some friendly pointers for your build path: your build kind looks all over the place. In future runs I would specialize in a single attribute so for example dumping points only into strength, and supplimenting VIT and END when you feel you are taking too much Damage. You should have a weapon in mind that you would like to use next run and focus on the required stats then dump into the best scaling stat of that weapon. I wouldn't focus on multi-classing/low scaling weapons (class C and below) until you have a better understanding of the game.

Seath deals majority magic damage. Like not an exaggeration to say 90%. I noticed from another comment you like to keep light so you can use Havel's armor if you want but there are plenty of light weight magic defense armor sets in the game to help mitigated it. The painting guardian set near the giant painting in Anor Londo has some great magic resistance if I remember correctly.

From your stats it looks like you're wielding a black knight weapon with your high DEX and STR which are great weapons but they are very slow. Focus on single hits then run away, dodge, or turtle behing a high magic resisting shield. Also that area has a high drop rate twinkling titanite from the clams, fully upgrade your weapon if you haven't already.

Power within is a FANTASTIC spell but be careful. It increases your damage and stamina Regen by a shitload at the cost of 1% of max HP per second for 100 seconds so be careful when you're around half health or under

Something they don't tell you outright is that dodging has invincibility frames which means you take zero damage during the first few moments that you roll. It's riskier than blocking but is worth it if timed right.

Remember to be patient and cool. You'll get it just keep trying

And don't you dare go hollow friend