u/Sufficient-Lemon8951

Hi everyone, i have an connecting flight in dallas from frankfurt germany to lubbock. I would like to know if 3h of layover is okay to process everything i mean through immigration getting my checkin luggage and check in it again for my domestic flight to lubbock? This is my first time visiting america, and I am not aware that i really need to get my luggage and check it in again. So I am so curious if 3h is enough for everything or is it tight? Thanks for your answer