we need to go deeper male reader insert (On Hold For A Bit)

hey, I know I should be working on my other story, and I will, trust me, I will but this idea has been stuck in my head ever since I found wattpad and remembered what we need to go deeper was. and honestly no matter how hard I looked I couldn't find any we need to go deeper stories. so I'm making my own. this will be a learning experience for me as I'm still a rookie at writing, I may go back on a few chapters to proofread my work send it out, read my work and edit it, send it back out. so on and so fourth. anyway you, the reader, had a great relationship with your grandpa the captain, designer, and builder of the Nautilus, captain Nemo, however when he never came back from his trip you didn't give up hope that he was still alive and that nothing could beat your granpas mind. you then invested and invented peculiar items to help you on your journey as well as the submarine. join captain Y/n Nemo as he gathers his crew to find the Nautilus and go back home!
(Also feel free to steal the idea, just be sure to credit that I came up with it.)