shuld i read this?

Y E S

Yes, but if you have the time and attention span for it, I recommend the novel. A lot of things were cut out of and changed in the manhua

Do u know any sites that have the novel?

https://www.novelupdates.com/series/necromancer-survival/

Novelupdates has a shiteton of links to translated novels.
And I really emphasize the "if you have time" part since the translated novel sits at 350 chapters and still ongoing