Ensure your broker offers IPO access. Some platforms like Robinhood and Fidelity allow retail participation, but may require a minimum account balance (e.g., $100,000+) or specific trading history.
Markets are extremely volatile on day one. A limit order is safer than a market order as it prevents you from accidentally buying at a massive spike. how to buy ipo stock on first day
If you did not receive an allotment, you can buy shares on the stock exchange after the "opening print". Ensure your broker offers IPO access