Everthing there is has a smallest part.
All those "smallest" parts are actually the same stuff: atoms.
Plants, animals, minerals, gas, planets, frisbees, moon rocks; all are made of atoms.
Think of atoms as letters in a large alphabet.
The letters "P" "T" "S" and "O", can be like hydrogen, helium, oxygen, nitrogen, carbon atoms.
The characteristic of atoms (the nature of atoms) is to attract and repell depending on what parts of them are arranged randomly a certain way.
Think of it as tossing SCRABBLE tiles with "P" "T" "S" and "O" first this way and then, that way over and over again.
You can get these possibilities:
1.PTSO
2.PSOT
3.PTOS
4.POST
5.OPST
6.OPTS
7.OSTP
8.OTPS
9.SPOT
10.STOP
11.SOTP
12.SPTO
13.TOPS
14.TOSP
15.TSOP
16.TPOS
etc. etc.
You'll notice that 5 of the above turn out to be "something" rather than random nothings.
Why? Only because it was possible. No miracles; just possibilities.
That is the simplest explanation for why "something" rather than mere chaotic "nothing" is the predictable result of constant combinations of atoms (or letters).
The more letters you have (the more atoms you have) the more possible combinations are possible.
Some become "something" and many/most become not much at all.
IF YOU CAN COMPREHEND THAT you can begin to comprehend what evolution is all about. But, that is the most important starting point.