Hi Dr gouzi

Here is a usfulle link

https://ambermd.org/tutorials/advanced/tutorial9/index.html

Hicham Gouzi , You can have a look on this

https://ambermd.org/tutorials/advanced/tutorial9/setup_old.html

http://ambermd.org/tutorials/advanced/tutorial9/

https://mmb.irbbarcelona.org/biobb/availability/tutorials/protein-complex_md_setup

and also the similar question asked here

https://www.researchgate.net/post/MD_simulation_of_protein-ligand_complex_using_the_Amber_program_available_at_The_Bioinformatics_Resources_Applications_Facility_BRAF_at_C-DAC

There are various tutorials provided at the Amber website. Try your hands out with the one which suits your work. They are pretty good and user friendly.