Roleplay advice please :)?

As an inexperienced GM Im looking in to the Warhammer 40k TTRPG systems to use on an All AdMech campaign in IT-support of Epic proportions what are your folks suggestions on the subject? Be they speech patterns of Mechanicus, encounters of martian politics, NPCs both friends foes and rivals, Puzzles to test players intellect, Lore of the world and More? Im interested on a lot of ideas and suggestions to throw at the players who know the basic premise of warhammer 40k world. So hit me up with links, ideas videos, books, lore and more you might think could help us to get Mechanicus IT support teams story going! Praise the Omnissiah!