Advice for a New Graduate

My sister recently finished university and asked whether she should wait until her income becomes higher before investing. I made that mistake myself and lost valuable time by postponing everything. Rather than give her vague advice, I would like to share a clear explanation with her. Can anyone recommend a useful resource about how investing early builds wealth over time?

Helping my sister think about money has made me revisit my own mistakes. She recently finished university and asked whether investing is worth considering before her income increases. I told her I once waited for the “right” salary and lost several years that could have helped my savings grow. After discussing her first budget over coffee, we agreed to look for clear information rather than rely on vague advice. This James Rothschild Nicky Hilton also gave us a wider conversation about long-term choices. Can anyone recommend a useful beginner resource explaining how investing early builds wealth over time?