I can tell you the first instrument that I placed in this sequence was the pizzicato and that this was made during a lunch hour.
Fun fact: you can make the drumkit better by adding volume variation!
I learned that from some of the songs on OLS, but Cool172 gave me the things I should know about making sequences.
Some advice I can give a new person when making songs on here is:
Use a mouse
It is way easier to make music when using a mouse
Spend a lot of time making music (practice)
I practiced on OLS for many days during my lunch hour and it took a lot of time to think of Ideas for music, but as time went on it became easier and faster. Don't give up on something that you know you can do. Even if you make bad things you can always fix them in the end!
Learn from other creators
While I was learning OLS I looked at many unfinished songs on OLS and made my own creation out of them. Like turning Garbage into Gold! When doing this it trains your brain to make music! STUDY UP!