First, focus on the main features of the character or object. Use simple strokes and avoid too much detail initially. Also, look for online tutorials or reference images to guide you.
Love letters manga often have beautiful and heartfelt illustrations that convey deep emotions. The storylines usually focus on the process of writing and receiving love letters and the impact they have on the characters' relationships.
Well, 'Love Fighter' could potentially be a manga itself, or it could be a concept that takes cues from the manga world in terms of style, themes, or story structure. But without more context, it's hard to determine precisely.