Question: I love music and I would love to make it and maybe become a music composer. However I do not know anything about music theory or anything. I can't play any instrument or so.

How can I learn to make nice melodies? I cannot make even simple ones. I want to make genre like [Big Room House](https://en.wikipedia.org/wiki/Electro_house) or [Drum and Bass](https://en.wikipedia.org/wiki/Drum_and_bass). Is it possible for everyone to learn to make nice melodies? How can I achieve that? Please help me. Thanks!

It always sounds in my melodies like they are not in sync with other instruments and no matter what I do, even if I occasionally create a kinda good sounding melody, I cannot make any upcoming sequence or next sequence for it so it always sounds the same.

Answer: 
The "Cruel but Fair" school of hard knocks would say...  

Try, try, try again & if at first you don't succeed... try again... [or give up, the choice is yours.]  

..& if, after another 10 years, you still get no takers - then either you have a) no talent whatsoever or b) no-one has yet recognised it. 

It is almost impossible right now to say which that would end up being. Some people grasp it with almost no training, others have to hammer at the underlying theory for a decade & still never get there. There is no perfect method, nor guaranteed result.

I'm assuming you don't feel the need for a Bach-like knowledge of music theory, just an instinctual awareness of "what sounds good for a 'pop' record" [I use the word 'pop' very broadly, just to differentiate from 'classical']. Both approaches are 'acceptable' for a given audience.

Music is an art, but it is also a craft. To roll out the old cliché, "Practise makes perfect." 

Study the songs & artists you like, do research on how they craft their work. Emulate their sound, then step outside that & make your own.  

For non-classical music, there are no rules - or rather, there are rules, but you can follow them without even knowing at an educational level what they are.
Funny you are 18, since this is exactly the same age I started getting to production. Prior to this I was into DJing. At age 19 (sophomore year), I realized that my music sucked, my music was not cohesive, and basically everything you just described as being your problem.

My solution? I enrolled in a Music Theory Fundamentals class at my college, which changed everything. Not only did it teach me the fundamental theory needed to actually make "good" music (rather than doing trial-and-error and "wasting" a LOT of time), but it exposed me to classical music. That semester I stopped producing and started composing for classical; never went back to production (although I have been thinking about it recently; deep house has become very enjoyable for passive listening). That was 10 years ago.

So, to answer your question: in order to get "better", you will need to put **time and effort** into learning music as a language. If you are prepared to do this (I think you are...) then find a theory book somewhere. And, yes, learning theory will require you to learn how to read music. It really isn't as difficult as you think.

One thing that is over the top but would be **EXTREMELY** beneficial to you is to buy a used digital piano (200-600 bucks) and take piano lessons for at least a few months since you never played an instrument before. This will expose you to what it is like to actually "play" an instrument, rather than program notes/sounds into your software. (Also, it is a lot faster to play notes into your software than having to click and type them in).

Hope this helps you.

EDIT: Oh and in case it hasn't already been stated, the obvious other piece of information is you will need to listen and analyze the music that you want to produce. You like DnB? Listen to a lot of it, and see if you can find samples and midi files or something so you can actually look at what other producers did.