Can of worms time again.

There are three minor scales.
Natural minor, Harmonic minor and Melodic minor.

The natural minor scale is the one you get if you start on the 6th note of the major scale. In the key of C there are no sharps or flats. The 6th note is A so start a scale there and you get

A B C D E F G and A again. This is the natural minor.

The harmonic minor sharpens the 7th note and you get

A B C D E F G# and A.

This allows you to have an E major chord instead of an E minor or G.

The melodic minor scale is particularly perverse scale because you sharpen the 6th and 7th notes as you go up the scale but you use the natural minor when you descend. So A harmonic minor goes

A B C D E F# G# A G F E D C B A. Weird.

Of course all this is only so if you follow the rules. There are, and always have been musicians who don't know or do know but don't bother to obey the rules. You only need to know these rules if you want to pass music theory exams.

In making music it should be enough for you to like the sounds you make. The rules only ever come after music has been played. They are an attempt to explain what has happened and should not be seen as a 'How to do it' manual.