weight 0.7 is best.
I created this LoRA as requested.

Please read the description.

outfit1
1girl, solo, long hair, blonde hair, double bun, drill hair, brown eyes, school uniform, green bowtie, white shirt, sweater vest, yellow vest, short sleeves, plaid skirt, green skirt


outfit2
1girl, solo, long hair, blonde hair, double bun, drill hair, brown eyes, school uniform, green bowtie, blazer, yellow jacket, long sleeves, plaid skirt, green skirt

I uploaded a sample image of the outfit as a post.

Due to the small number of images in the dataset, the character's clothing or pose may not be fully realized.