Shaykh Imam Tirmidhi is someone I love greatly I am memorizing Al Arba'een and then umdatil ahkam would obtaining all his kutub his Jami to memorize in the future and the rest of his kutub to study be useful? I want to become a muhaddith as he was inshallah are his books on Ilal useful? Jazakallah

Ustadh AbdulAziz al-Haqqan

Yes, but take it bit by bit, u must seek ilm according to the schedules that the people of knowledge in this field have put and organized.