Investing doesn't have to be hard. And not at all if you choose to invest in ETFs in the app.
An ETF (exchange traded funds) is a group of businesses which are put together in an index fund, and are traded on the stock exchange just like regular stocks.
With ETFs, you're investing in a number of businesses in the same index. It could be American stocks, green businesses, or tech. The object is to follow the development in businesses in the same category to get a yield that reflects many businesses and not just single stocks.
Said differently, you get a small bite of all the stocks instead of having to choose one. It's easy and manageable - even if you've never invested before.