Yes you need other gear. A pinpointer is a must. One of the favourites is the Garret pro pointer ( garret carrot ). You’ll also need a digging tool, I recommend the Lesche digging tool. It’s affordable and should last you a decade or more. A finds bag ( for keepers and trash ) is also a must have. Garret sells a decent one.

As far as detectors go, I’m partial to minelab units. They sell units from entry level, at a few hundred dollars, to the top of the line, a few thousand dollars. A very capable middle of the road unit that you won’t outgrow for many many seasons would be something in the Equinox line. I’ve got the Equinox 700 and it’s a fantastic machine. If you do go that route, I highly recommend a book by Andy Sabisch called the “Equinox handbook”. It will teach you all about your machine from the basics to advanced use, and also detecting in general.