Investing in the stock market has never been easier, but with so many options available, new investors can get overwhelmed. The key to success is to keep it simple and keep costs down. DIY investing platforms let you invest around the world at a low cost and with little hassle. You can pick your own investments or be hands-off and let someone else do it. Even a small monthly investment can make a big difference. Warren Buffett recommends investing through a simple, cheap tracker fund. You can also consider multi-asset funds, which make investment decisions on your behalf, splitting your money across a mix of different assets. Investing in shares requires time and effort, but experts recommend building a diversified portfolio with at least 20 stocks.