I'm not a techy wunderkind or something, but here are some tips!
Redstone can be obtained by mining or smelting redstone ore, destroying jungle temple traps, crafting blocks of redstone, killing witches, trading with villagers, or by breaking previously-placed redstone dust. It can also be found in chests that spawn in naturally generated structures.
Redstone dust can be broken instantly using any tool, or without a tool, and drops itself as an item. Its hitbox may only cover part of the surface below, depending on the orientation of the redstone.