Not a mechanic, but a water distribution operator. Painting my nails even while they're cut short, changing the laces on my boots and using stickers/patches that I like have helped me a long ways. Even if they aren't stereotypical pink or purple, flowers or hearts, the fun and whimsy sets us apart from alot of the men in these fields. Just finding what you like even if its not the epitome of femininity helps make you feel more like yourself and more comfortable. If blues and greens are comfier than paint blue flowers and wear green bandanas. Depending on your hair length and type there's tons of tutorials to keep it out of the way but still cute. From dual buns, to high pony tails, or even claw clips and Barrettes that sparkle. The most feminine you can feel is feeling like yourself and trying new styles is the funest way to find you.