Omnificence. Imma use my powers to make it that my birth is an illusion so I can obtain Causa Sui Physiology and Non-Created Physiology. First, imma practice a little to get used to my powers. Second, after I get the hang of it, Imma give all of my good homies in the wiki Boundless Inner World so they can enjoy doing what they want without interfering with the real world or harming anyone. Third, Imma invent or create a full dive mmorpg vr game that is realistic and anyone can enjoy ( its like a game version of Boundless Inner World for everyone). Fourth, Imma restart my life form zero and live it again (of course making it the best life) and after i reach a certain age and write my name in history, Imma fake my death. After I fake my death, imma change my appearance to Sasuke Uchiha including voice and all and travel fictional universes/worlds (or create them if they don't exist) and have fun role-playing and being OP there. Of course, Imma help our world by ending wars and poverty and racism and such. Imma donate money so to help anime animators and donate for all the charities in the world.
Making manhwa IRL would sound fun but also reckless since there would be a lot of causalities and I don't want that. Some other minor things that i would do is: I would perform magic tricks in school classes and everywhere and amaze people. I would of course advance humanity but removing stuff like hunger and all I wouldn't because I think that we would no longer be 'human' and all.
Also, I would firstly generate a random anime isekai world and become and adventurer there. I would complete missions, save people and surprise everyone with my PAWA! After I am done with that, I would go to actual anime worlds and role-play there. For example: I would go to DanMachi and make it so I would be Bell Cranel's older brother who thought him everything and that Bell Cranel respect and admire the most and be the one who thought him about heroism instead of Zeus. At the same time later in the series, I would come to visit him and join his Familia. I would also surprise everyone he knows even the Gods. I would kick the ass of The Freya Familia and The Loki Familia and have Ais Wallenstein join The Hestia Familia. I would also sometimes replace the Main Character of the anime, For Example: I would go to Re:Zero and instead of Natsuki Subaru, I would be the Main Character. Of course, i won't be lame as him; actually, imma be really cool there! i would actually act goofy like Subaru and progress like the story, but I would reveal my true power when I fight Julius in the mock battle when i rebuked the council of elders to protect Emilia (you know if you saw the anime). Everyone would be present saw I would show them my true and fearful power but still act goofy in the midst of their astonishment. There, they would know not to mess with me. Of course, i would have a long talk with Emilia later on, since I hid my powers away from her all the time. Oh btw, I would marry both Emilia and Rem. Thats not all! My adventure only begins! I will go to many other places and stuff! The above was just a small example.