Minecraft commands simply explained.
what should i know
/ tp
/ give
/ replaceitem (or snapshot / item)
/ time
/ weather
/ execute
/ worldborder
/ msg
/ summon
That should be enough for one episode…
/ give (your name) (item / block) (how much), e.g. / give @s diamond 32, gives you items / blocks
/ clear, teaches your inventory
/ tp (your name) (coordinates / player), e.g. / tp @s 100 56 38, teleports you to a certain location
/ locate (structure e.g. Forest estate, shipwreck) e.g. / locate mansion, gives you the coordinates of the next corresponding structure
Thank you very much