You start on an island with only 1 water source and a sapling. trough ex nihilo and pebbles you can get yourself started.
I have included a quest book, but it is not yet completely finished. I suggest using the advancements tab to get trough all the mods.
When you create a new world, make sure to select world type : skyblock ==> customize ==> island
If you find any bugs or materials you can't get, let me know and I'll fix it
Have Fun !!!