Helpless to Cultivate Immortality

A mortal, who only wants to be a knight, has gone to practice immortality for some reasons. I have never seen any rare and exotic beasts in my 19 years of life. It's really strange. To be honest, I really don't know how to write an introduction. I just want to write in my spare time to pass the time, so I would like to ask anyone who has the chance to see it to correct the mistakes and provide some materials. Thank you. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.