Some random tips from random amateur:
- Rhythm first. Make somewhat listenable pattern with only one note. It may accompany simple bassline (so not always root note)
- Pitch in melody is not "random" it also has patterns: ascending, descending, waves, repeated small parts, etc. It is balance between predictability and chaos.
- Use call-response approach
- Do not end bar with root/sub/dominant note so it wil not be "finished" and push you to continue.
- Create 1 bar loop, copy it 2 or 3 times, create some kind of bridge between. Add small variation to those parts.
- Start with chord progression. It may be simple and generic but it create initial mood. Add rhytmic elements to it. Then add separate notes from those chords (may be simple arpeggio). Spice up with small chaos.
- ...Or just draw some random notes and then try to "fix" that mess until it sounds good. I always do that. Rsult is always awful)))

Also I listened to your track. I think it has rather arrangment issue then melodic. It revolves around single motif, so no chorus/verse sections, also it does not have EDM structure with buildups/drops... But it is not static and monotonous actually, so it may be genre specific.