Yeah mining to the bedrock then dying in a lava stream after an hour is no fun for one person, I dont have the patience to build my own rollercoaster and things
I find getting started is the hardest part, I either get killed in the first night or cant gather the raw materials to get my little cavewall workshop setup, coal especialy has been a real pain to find sometimes. Once you have a door though youre pretty much safe from everything until you go too far into the depths or do something stupid, e.g. lavadeath.
6 double chests is mental! I get nowhere near that much stuff together. I do think in future Im going to build camp right next to the spawn point though, I always get lost!