Parallel parking remains one of the most common concerns for novice drivers. Even drivers with many years of experience can still be intimidated and need tips. Parallel parking can also be difficult if you have spent the majority of your journey outside of urban areas. As nerve-wracking as it may be, parallel parking can be easy once you've learned the basics.
These tips should help you out:

STEP BY STEP TO PARALLEL PARKING

Step 1: Choose a parking space

Before you decide how to park in parallel, step by step, you must select a suitable parking space. For this tutorial, we assume that you park in a parking lot to the left of the car. For effective parallel parking, ideally park your car at a distance of about three feet (about 3 feet) longer than your car. If you are still a bit nervous about how to park in parallel, you may want to allow yourself 6 feet.
Then make sure that the area you choose is safe and legal. Look for signs of parking restrictions or restrictions in the area. Now examine the curb. Be especially careful when the curb is particularly high, as you can damage your car if you misjudge the distance.
Also, make a note of what is protruding from one of the vehicles you want to park in the parking lot. If any of the vehicles have projections, such as a trailer hitch, you should take this into account to make sure you have enough space for your car.

Step 2: Position your car to start parallel parking

After identifying a suitable parking space, you can start with parallel parking. As you approach your chosen car park, head towards the car park and gently brake to alert other road users that you wish to park. Pull up in front of the parking space next to the vehicle until both rear bumpers are in line. Ideally, you should leave a distance of about 2 feet between the side of your car and the vehicle in front of the room. Remember, however, the closer the parking lot is, the closer you need to be.

Step 3: Maneuver your car in the parking lot

If you are sure that the road behind you is clear and you have checked all the mirrors and blind spots, put the car in reverse.
Lock your bike to the left and slowly start backing up. If the passenger side of the vehicle is behind your vehicle in the center of the vehicle, stop the steering wheel and straighten it. Continue reversing until your front bumper releases the rear bumper of the preceding car. Now stop and turn the steering wheel all the way to the right. Continue reversing until the number plate of the preceding car is centered in your windscreen. Now raise the steering wheel again and continue to reverse until you are satisfied with the distance between the two cars. With this technique you move your car into the room and align it at the same time.

Step 4: Position your car inside the parking space

After successfully landing in space, you may need to do some repositioning to make sure your car is parallel to the curb. If you have room left, continue to drive in reverse until you almost touch the car at your stern. Then reverse the gear, lock the steering wheel in the direction of the curb, and drive slowly forward while straightening the car. Repeat this process until you are satisfied with the position of your car. Repositioning your car can be a little tricky in smaller spaces, and you may have difficulty in getting the front of the car as close to the curb as you want. Finally, make sure that you have parked so that the car in front of and behind the vehicle has enough space to drive out.
When parking parallel, try to prevent the front of the vehicle from moving too quickly into the room. If you do so, you risk a collision with the car in front of you.
If your rear wheel touches the curb, you do not need to be alerted! They have come back too far, but they simply shift out of reverse, moving forward and starting the process again.
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Source:
http://www.eliancars.com/2018/12/how-to-parallel-park-tips-on-how-to-do.html#more