I watched a lot of youtube videos that aim to teach how to pronounce words like bottle and battle. I listen to the American flapped T carefully but I still don't know how to repeat after them because this sound doesn't exist in my native language. I don't know how to move my tongue. Would you give me hints or tips to help me, please?
Also, when I try to pronounce responsibility, security, probability, possibility. They sound like responsibilily, securiry or securiddy, probabiliddy, possibiliddy. My d sound is much more stronger than what Americans say.