Art Guide, by Artist Bloxxed.
The only way you are going to get better at drawing is to copy and replicate stuff, and remember, drawing is putting shapes together, literally.
For example, if you want to make a head, you first draw a Egg-like shape, then you start adding ovals rectangles for the nose and eyes, then you get down the most important features then put in details, remember, don't immediately jump into drawing shadows and stuff, practice. I always get annoyed at not being able to draw certain stuff when I was about 9-10, I kept throwing away stuff and kept crying for getting annoyed, but obviously if you want to be good you can't rush something, remember, every piece of art has to have a meaning.
Lets base it off of Blockland for a second, when you first joined Blockland, you probably built a red square house, when you join other servers you find other nice builds and you get inspiration, inspiration is the key to success, so when you saw that build and thought "Wow, let's make that!" you start to make it and it's not going to be a red square, it's like Blockland, when you start to get older and older and you start to see more interesting builds, you think "Wow, I'll take a bit of that, and that aswell, and compile it together."
I stopped playing Blockland a while after I built so much stuff, that was back 1 year ago, and when you start building or drawing stuff, you start to get bored, normally you can just play a game and just get inspiration like a click. I'd say get inspiration and LOOK at drawings, copy them and replicate, have fun with them, ever heard of Caricatures?
Artists everyday just sit themselves down and draw stuff, they mess about with stuff, they can make features of people bigger or smaller, take a look at this:

Look at the details on what they have done if you see this is from a TV show,(I forgot) one day this artist probably got inspiration from this TV show and decided to make a Caricature of this person, they decided to get a proper picture of this person and they sized up the features, look at his head, they decided that he has a big head so they'll supersize that, look at his mouth and other features, the only way you are going to get better is to mess around with stuff, supersize them, shrink them, put the nose on their chin, do whatever, experiment!
Let's have a look at a another subject, lets take architecture.

Here, is Big Ben, and in the background, you can see the London Eye and a building to the side, if you can see you can see little tiny indents that make it unique, if you're going to make a Building in Blockland, would you make a 10 high red cube or a 20 high different styled building? Things like this make people go "Wow" and that's what you are aiming for, the best part about this is because it's night time, it's shadowy and you can see there's a light shining on the building. This is also the hardest part as Shadows, you're not trying to shade in stuff, you're trying to make it darkened, not shaded in.

Look at this Big Ben, a nice clear picture and just a nice dark background, great, now the only way you can make it illuminated is to use Paint or colours, paint is the best thing I personally use as it's brilliant, but it's in your own opinion.
Also, another thing, try doing 2d objects first then try and experiment with 3d, you're better off starting simple, don't go into shadows immediatly, try replicate a celebrity and make it as basic as you can, I suck at art and I love making Caricatures, that is the funny strange looking photos, you know.
By the way, Caricatures are basically to mimic and make fun of a persons personality of some sort, look at this.
Meet Simon Cowell.

Simon Cowell is known for his snobbishness and his huge white teeth and his meanness, someone didn't like him and decided to make features of him bigger, and he always wears a black shirt, anyone noticed that?
I personally think you should start on replicating 2d objects then go onto Caricatures, it's a really fun subject to do and if you mess up their nose, you can say it's meant to be in there, they have a big nose!
I'm pretty much finished here, experiment and explore, look at websites, google images, look at architecture or even try and print a picture of a celebrity out and replicate it on a piece of paper, the only way you are going to get better I keep repeating is to copy and experiment, make features bigger or smaller.