You can speedrun just for yourself! I tried to do it a few times but i always died pretty early into the game. The farthest i got was making the nether portal, walking into the nether and immediately sprinting off a cliff and into a giant pit of lava. Also, lowering the difficulty is a good idea! Easy is the easiest difficulty one can beat the game in, but it can be a good idea to start with peaceful, because that difficulty has no hostile mobs at all!

When I first got it I put it on Hard for some reason, because I was like “how hard can it really be??”

And now I realize I’m an absolute idiot and I really need to go back and change the settings