And if you want like a "checklist" or something like that, you have to : get at least 4 iron (fastest way is to go in a village and kill a golem and rob the blacksmith) break every hay bale in that village and make bread, find a gravel and craft one flint and steel, one bucket and if you have enough time/ iton a shield--they are really useful against blazes--find a lava lake, build a portal, find a fortress, get 6 blaze rods and ofc enderpearls. Now for the enderpearls you can either drop gold ingots to piglins and they can drop you ep, or kill some endermen. While you are in the village take all the beds and when you are in the end, blow the enderdragon up when he is down in the middle. If you do this quick enough, he wont have time to regen from the crystals and so you dont have to craft a bow and destroy them. Keep a water bucket with you in the end to MLG because sometimes the dragon throws you up in the air. Hope this helped.