Soul-Killing: How Can I Cultivate Immortality When I Am Impoverished?

I am really too poor. I am just a little peasant kid at the beginning. How can such a time travel develop? I have no idea how to do it. I can only sell some DIY works I learned in my previous life. Can I cultivate immortality in this way? Oh, and I also need spiritual stones. What should I do if I can only sell copper coins? It is too difficult. It is simply a hell level difficulty. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.