Sophisticated backpacks, Iron chests/barrels, and occultism has a refined storage like system that can be upgraded for huge amount of storage and remote access across dimensions

Not right away, there is a mechanic that allows you to remove it later in the game, or you can drop to creative in single player. Choose wisely!

Create was added to help with logistics. Magic mods have entities that can do tasks for you.

The honey generator from Resourceful Bees, and Mana Fluxfield from botania can provide you power.

Use natures compass to find a forest biome. Once there look for a surface cave, you should find plenty. If your still having issues, you can craft it with nether quartz and cobble (makes diorite), and diorite and cobble makes andesite. Or look underground for Occultism groves. The divination rod from occultism can also help locate some.
Diorite will spawn in Savanna, Jungle, and Mushroom biomes.
Granite will spawn in Mountain and Hill biomes.