There are four tetrachords, which are just four note mini scales that span a fourth. There’s the major, the minor, the upper minor, and the harmonic. The cool thing is you can put any two of them together, and with a whole step in between them, you can come up with all sorts of different scales.
The major diatonic, the melodic minor, the double harmonic. Try a few and see what you come up with. Come talk to us about getting it from here over to here.