What should I do if I'm still really lost and can't find home?

If all else fails, there's one last thing you could do. If, when you logged on and entered your world, you started by your house, you can check your Minecraft log file. It's located in .minecraft/logs (the .minecraft folder can be found by entering %appdata% in your search bar). In the log file named latest.log, look or search for a line that looks something like this: "YOUR USERNAME" [random text] logged in with entity id 999 at (xx, yy, zz). These are the coordinates where you spawned when you logged in. Make sure cheats are enabled and type /tp xx yy zz in the chat to teleport to those coordinates.