There are lot of Stock Trading app and software. They are build by brokers and/or investment firms. They would could provide you the tips & advices to buy stocks. It is risky market . So follow these basic tips.
1. First understand things a bit how it operates.
2. Use the money which you think you can afford other than necessities, means in direct words have no regret to loose it.
3. Brokers will advise because they make money while you buy the stock and sell the stock. Thus take time for point #1.
4, First buy the shares of the business/company you know most or like most.
5. Plan for long term or short term investment.
6. Follow the trends and don't panic. Take calculated risk i.e. work with brain more than heart.