Yes I highly recommend buying it.
Resources can take a while to get at first but with experience it can be very very quick, there's a thing called creative mode where you're invincible, can fly and have unlimited resources in case you want to build and not play survival.
Zombies can be a pest depending on which difficulty you play on, peaceful allows you to play without any mobs like zombies, skeletons and creepers being around to kill you. You can build a box, pit whatever you like to protect yourself and wait for night, or sleep in a bed to skip night time.
A Minecraft day is 10 minutes in real time or 11.5 minutes counting dusk/dawn and night is 7 minutes.
On PC the world is endless, well to the point as you will never reach the end but of course there's an end it is just unknown, on Xbox it isn't endless but a fairly big size, big enough where you won't run out of space unless building 1:1 scales of countries.
I highly recommend getting it on PC for these reasons:
- Infinite World
- More up to date so you have more blocks/ biomes and Mobs compared to console versions.
- The use of mods so you can make the game different for example adding machines to automate things or adding new animals and things like Pokemon.
- Join great servers filled with mini games which is fun to play on your own or with friends
- Create free custom skins for your character
- Use free Texture Packs to make the game look nicer, which costs money on consoles.
- Much better controls
It is both MMO and Single Player so up to you on what you want to do.
You can get a Demo here - https://minecraft.net/...t.net/demo
The demo gives you access to the Single Player mode for 100 minutes.
Commitment depends on what you plan on doing, normal survival no, building scale models and big maps yes.
Marcus aka Notch who created the game got part of the idea from Lego so it is very similar, it's digital legos pretty much.
bad guys as in real people or in game characters? There are mobs in the real wold such as Skeletons, Creepers (which blow up) enderman. And for real people sometimes there are online but the majority of the community are friendly. You can find a list of mobs here - http://minecraft.wikia.com/.../wiki/Mobs