Learning Japanese: Does anyone else feel fluent until it comes time to actually speak like a real person?

Hi everyone! I’m a Japanese-Canadian-Turkish actor and language learner currently working on a personal project — and wanted to ask a quick question to the community. I’ve been experimenting with using acting techniques on anime/J-drama scenes for;

• Fluency
• Intonation
• Body language
• Slang/casual tone

Would love to hear what parts of speaking Japanese feel most unnatural for you and how are you improving it— no pressure, just research~

https://preview.redd.it/mmcwaw3lmmhf1.jpg?width=1920&format=pjpg&auto=webp&s=840761a8831692f696addee0ef3d766787192edf