I am a dance teacher and also a novice investor.Due to my work schedule,I haven’t been able to keep up with the market,so I bought some short-term stocks based on recommendations from friends,which resulted in a significant decrease in my investment portfolio.After careful consideration, I’ve decided to sell the underperforming stocks and rebuild a long-term,stable investment portfolio.My goal this time is to invest in S&P 500 component stocks or growth-oriented ETFs. What would be a reasonable allocation for my portfolio? And which valuable stocks should I focus on? Thank you for your help.