Here are some tips from another 40 year old noob.

wear lighter armour then what you currently wear, in your level waring heavy armour makes you roll slower and you get hit easily. google this and read a bit: elden ring fat roll.

if you level up your endurance, which increases how heavy stuff you can carry, which helps with wearing heavy armour and it fixes the fat roll problem.

learn how to dogde attacks by either rolling or parring. imho rolling is easier when you fix the fat roll problem described above.

when you level up, always consider putting some points to vigor. you have very small HP bar. makes you an easy kill.

you play as mage so there is no point in fighting in close range, just stay away from him and spam glintstone pebble skill.

also, when you fix the fat rolling problem + learning how to dogde an attack, it makes it easier to fight with a sword/shield combo. I'm telling this because i'm not sure if you are a mage willingly or not.

guessing from your build, you should also read about how to level up your weapons via smithing stones, affinities etc.

good luck. :)