I think the issue was it wasn't clear what items were available to craft. If I had known that axes, pickaxes, shovels, etc. were all in the game then it might have been easier, but even making the crafting table (2x2 wood planks) wasn't very intuitive. Honestly, there wasn't much of a clear path forward with most of the recipes. Advancements and the recipe book later helped a lot, but it was pretty hard to play during beta and alpha without the wiki or a mod like TMI.

Then there's redstone. I feel like even today, redstone is completely unexplained in the game, and while you can kind of figure it out on your own, many of the intricacies are left unexplained (repeater locking, timings, comparators, how redstone is passed/not passed through different kinds of blocks, gates, etc). Without taking some time to learn about digital logic and basic computer engineering concepts on your own, redstone is basically magic dust that does a thing when put in a specific configuration.

Also, being pedantic, but shears weren't added until beta 1.7. Wool dropped from sheep before that. That being said, alpha had a lot of really weird mob drops (why did zombies drop feathers?) and there wasn't much use for wool anyway beyond decorative purposes and hiding doorways with paintings until beds were added in beta 1.3.