If you only practise one thing this month...
If you study the harmonisation of the melodic minor, you’ll encounter three differing chord structures: minor (Maj 7th), Major 7th (#5) and minor 7th b5. Concentrate your efforts on the arpeggios associated with those structures. Don’t shy away from these arpeggios just because they’re new vocabulary – even the smallest steps in their interpretation will help you see the bigger picture.