It may depend on how much you're looking to invest and how much research you would like to do.

In my opinion, for investments starting under $50k, you can go for a online brokerage firm that has several products that are safe and give you the flexibility to invest how you like. This will require some research on your part.

For investments over $80k, a personal broker can be helpful.

Brokerages like Fidelity, e-Trade, Charles Schwab, etc are some of the biggest names that have both personal brokers or online self investing options.

Good luck.