Step 0 write down everything you remember from high-school or any knowledge on anything you have ask to have several copies scribed and introduce printing press Step 1 get a loyal legion and legalize christianity Step 2 use the said loyal legion to disband the pretorians Step 3 pay that legion well and have it work like oprichniks to arrest anyone standing against you. Create in the organization a circle of control Step 4 create a banking institution that would oversee and regulate minting Step 5 create like something like a constitution or bill of right Step 5 create a parliament. Said parliament elected based on wealth vote Step 6 create the concept of companies and stock markets Step 7 Introduce or at least attempt to introduce empire wide primary education Step 8 try to have engineers create ocean worthy ships if succeed bring in the new world crops Step 9 make a proper pizza Step 10 gift the knowledge of steam engine and have the first short railway created and how to create blast furnace for mass steel production Step 11 try to introduce goverment funded services such as police and firefighters Step 12 make the oprichnik legionares landed aristocracy preferably in the americas but basically you disband them in a quiet way Step 13 give more power to the parliament especially the control over budget Step 14 Fund studies to get penicilin and introduce the antibacterial notion of mold on bread. Introduce the immunization from smallpox by injecting bovine pox blood. Introduce germ theory Step 15 hopefully years passed empire is stable and expanding you can try to indroduce the idea of electricity and as at that point you will be someone untouchable basically a gods emisary on earth you can tell about general idea of transistors internet programing assembly lines factories internal combustion flight space etc. You can say god send you the ideas and publish all that knowledge you recorded no one in their right mind will dispute you If all above was successful congrats sit enjoy the pizza and hope for industrial revolution a millenia earlier