If you don't buy the exact same parts that are indicated in this tutorial, you might want to consider some compatibility rules.

For the motors, if the KV is higher, the motor will turn faster so there is no worries there. First, you want to consider is that the estimated thrust is enough to lift your drone. Also, make sure that your motors uses less amperes than your ESC and that your battery provides at least enough amperes for your motors.

For example, if you have a motor with 20A, you might want to take an ESC with 30A and a battery that has at least 20A but in practice you will go a bit higher with 25A to give yourself some room.

For the battery, the capacity in mAh indicates the endurance that you will have with it in flight. So the higher it is, the longer your battery will last.

Also, the distribution board has to have a 5V connection like the ESCs.

For the ESCs, verify that the recommended battery in the product description corresponds to the one you bought and that the voltage is the same as the distribution board (5V generally).

Regarding the flight controller, be sure that the entry voltage (usually 5V) is the same as the BEC.

Regarding the receiver, the minimum number of channels needed to control a quad is 4, but 5 is usually recommended.

For the transmitter (controller), a 2.4GHz was choosed, but if you go for a higher frequency like 5.8GHz, you will have a better performance for close application like FPV racing. However, the obstacles affect more the signal.