Few camera accessories are as versatile and necessary as a tripod. Whether you're shooting landscape, portrait, night, street, or even wedding photography, you're going to need a tripod at some point or another.T ripods are extremely useful in low light settings as the stability of a tripod allows you to take longer-exposure shots without any camera shake. This stability is also crucial for things like night sky photographs and night-time selfie shots.
A remote shutter release is useful because it lets you "take a shot" without physically touching the camera body, which eliminates the potential for camera shake and accidental blurring. It's most often used in conjunction with a tripod.
There are two kinds of remote shutter releases---wired and wireless---but it doesn't really matter which one you get. More advanced remotes have extra features like half-press support, built-in timers, and LCD screens.
If you don't have a camera with an interchangeable lens system, you can skip this section. This only applies to DSLRs and mirrorless cameras.
As you progress in your photography skills, you'll end up amassing plenty of different lens types that let you take all kinds of shots. But at the start, you'll be better off starting with a single prime lens. (A prime lens is a lens that doesn't zoom.)
Why a prime lens? Because the inability to zoom can teach you a lot about proper composition techniques. With a fixed camera lens, you have to think through your shots more, which stretches your skills and helps you improve faster.
Every photographer needs flash at some point, even if you don't intend to shoot in the dark---but don't use the built-in flash on your camera body. It's simply no good. Instead, spend a little bit on an external flash unit (also called a Speedlight or flash gun).
The Yongnuo YN-560 IV Wireless Flash is an inexpensive off-brand flash unit that's cheap enough to be affordable but still powerful, feature-rich, and stays useful no matter how skilled you become.