I play on Linux, but Minecraft works well in Linux, Windows and Macintosh. There are also clients for mobile phones. You may have to seek help elsewhere for installing Minecraft, for windows I think it is in the Microsoft store so that should be easiest.

Ok, Minecraft is a sandbox game with no specific goal or endpoint. The object is to build stuff and have fun. There is a dangerous element built-in in the form of Creepers, Skeletons, Spiders, and Zombies. Creepers are the worst - they destroy your actual work. The others can just kill you - you end up reincarnating back at the spawn point. The spawn point is the location where

1. you first appeared in the game world
2. the last place you slept in a bed.

I normally play with the dangerous "Mobs" (mobile items) turned off as I like the model-building aspect of the game.

Some of this will seem wordy and confusing - really it is simple but takes a lot to describe. Youtube has "First Day in Minecraft" videos by various players that will show you what I am describing. "https://www.youtube.com/watch?v=ADU1ycprBg4" seems good.

Ok, that's the environment, now the mechanics. You can move your avatar, you in the game, with the "w s a d" keys. these walk forward, backup, or slide right or left. You can change where you are looking with the mouse.

You can break blocks with the tool you are holding by holding down the Left mouse button. You will see cracks form and finally, the item will break. Move close to the floating broken item and you pick it up and put it in your inventory.

You can place items from your inventory into the world with the right mouse button.

You start with only fists as your tools - but you are strong, you can punch trees to get logs and cut down the tree. Find a tree that is not touching others and punch (hold down the left mouse button) until that block breaks - you will see a smaller version of the log floating nearby or you may pick it up automatically if it lands close to you. Likewise, punch each of the other log blocks of the tree. You now have logs!

You can use one log to craft a crafting table. To open your crafting interface push the "e" key on your keyboard - You will be presented with a 2x2 place to put items and your inventory. Drag and drop one log from your inventory into any of the 2x2 cells and see 4 planks appear in the output cell. Drag those planks back into your inventory. Take 4 planks from your inventory and put them in the 4 cells of the crafting interface and you see in the output a crafting table. A crafting table works the same way as your crafting interface except it has a 3x3 input area. The larger input area allows you to craft larger, more complicated things.

You want to get wood and build yourself a small simple shelter before night comes. The dangerous mobs come out at night and you want to be enclosed so they can't get to you. When daylight comes Zombies and Creepers burn in the sunlight and spiders become docile until the next night.

Now - many of the things you make on a crafting table or in your crafting interface require the ingredients be placed in a specific arrangement. You can learn of these arrangements by opening the crafting book (the book icon in the crafting interface)

Reply here if you have other questions - but go watch that video first. Have fun! Welcome to Minecraft. BTW I am 65 and playing Minecraft so don't let anyone tell you it's just a kid's game.

I usually hang out on Lemmy.one. I am waspentalive there too. I may be slow in responding if you reply. Sorry...