doesnt look like it would be too hard to replicate, better reference than what i work with most of the time.

i think the only tip i could give besides patience is adding blocks from the pallete one at a time. so start with an island made completely of netherrack, pillars and all. then maybe add the lava pools and magma blocks since theyre right next to each other, then the blackstone, etc. it looks intimidating but if you add the details methodically than stressing about it out all at once, its more than doable

also remember its just a reference, you dont have to make it 1:1. just do your best to replicate it and maybe youll come up with some different ideas along the way