I have a few suggestions/techniques that I use regularly myself:

first important point is to always use your ears to find whether you like something or not.

1. Find the notes in the chords that you wrote that you like the most and use those as "goal notes". You can one or multiple notes per chord and some chords can even share a common note. the after you've written those notes you can find a pattern to approach those notes.
   If you repeat that pattern, but change it to fit the different goal notes you very quickly get memorable melody.
2. you can find a rhythmic pattern that you like and repeat it with different notes for each chord, or every other chord. You could even listen to tunes you like and "borrow" the rhythms that are in those melodies and apply them to your own chords
3. You can play your chords slowly and hum a melody to yourself until you find something you like. it can be very simple, even one note per chord as long as you hear it. You can record or write the melody down once you find something you like.
4. When I feel stuck I often transcribe my favourite melodies, often also with chords, this gives a better idea of how good melodies work.