Try size: 640 x 640 or 512 x 768 (SD 1.5) / 1024 x 1024 or 768 x 1024 (Pony)
Weights: 1~1.2
Clip skip: 1
Training material from bing
Pictures from CalicoMix 8.5
Note: If need squatting or kneeling, please add "squatting" or "kneeling". The probability of success is usually about 1/3~1/4. (sometimes lower)
Reference video: