Elementalist Eviscerate build - please help

Hey everyone looking for some advice on how to proceed forward.

My build https://poe.ninja/poe1/profile/dancu-7260/character/Quelrogue_keep

the build that I was copying https://poe.ninja/poe1/builds/keepers/character/F4yah-7603/Keeper_Fayah?i=12&search=class%3DElementalist%26skills%3DEviscerate%26sort%3Dehp

and yes I've looked on poe.ninja for Eviscerate build, but most of them are with around 10000 jewels, and I am not that rich, and I don't really understand how that many jewels work together.

I don't really know how the build functions, I just run around the map with shield charge/frost blink and do Eviscerate when it's active and stuff dies

so how can I improve the build? I have around 5 or 6 div

I don't know how to craft items(the normal way sure, but craft this sacrificial suffix to block x and later use y because it has the same tag as z and use I don't know what obscure orbs that cost like 1 div each)

I do have the Melding of flesh jewel(-71/-5), but I don't understand how it works, should I change my rare items to have even more resistance?

I can do t16 8 mod no problem (no reflect ele)
I've done 1 t17, died only once because I didn't know that the boss did
I did shaper died around 3–4 times, elder is easy
I cannot do ubers maybe because I lack the experience fighting them or what, but I just get 1 or 2 shot.
Sirius killed me 3 or 4 times just because I didn't have an immunity to corrupted blood.
Yes, I don't have Enlighten I am poor
and purity of ice I didn't understand, I did try to see if with melding of flesh and purity of ice active I would get more resistance, but that was not the case, I had like 50%/20%/20% or something.

I do want to continue playing, I haven't had this much fun since the original Breach league lunched. But I do want to experience ubers and memories

Thanks in advance.

"I don't really know how the build functions"

Absolutely wild way to start a post, I would wholeheartedly recommend spending some time learning how your build works.

Look at all the items/skills/passives and try to figure out why they're being used.

I'm sure there are tons of youtube videos explaining most of these things, since it's an incredibly popular build.

Good luck, exile.