If you're looking for an alternative, I've had a great experience with "robo-advisers" (Betterment, specifically). Many of the same advantages as something like Robinhood: $0 account minimum, 100% digital (create and manage your account through the website/app, no paperwork, no representatives), easy to cash-out with just a couple days' notice. The difference is that they automatically allocate a diversified portfolio for you and let you control simple things like the stocks/bonds percentage you want to have (a proxy for risk-tolerance). They do general investment accounts (analogous to index funds), as well as IRAs and savings. Fees are modest and automatically deducted from your growing balance. Dividends and gains are automatically re-invested in a tax-efficient way.
For several years now I've put all of my excess money into Betterment aside from some basic emergency savings. If you want a minimal-effort way to make your money grow and/or don't have much to invest, I highly recommend it.
Also: I promise I'm a real person and this isn't a shill :)