Really great start. You clearly have a basic skill to begin practicing. Like a good blade you could sharpen very well.
Maybe you need a broader project goal?
6mm scale isn’t about Individuals but large numbers forming a big army. Because you chose this scale I would assume you intend big volume eventually. I may be wrong.
What’s the project? Is it a sci-fi, historical or fantasy setting? Some details may not be required at this scale where some may be vital and even exaggerated for effect.
ive found sculpting vehicles at this scale to be a tricky business. Often requiring layering and building up. I can’t imagine a 6mm figure has much room for layered detail but you seem to be getting plenty in there.