You should say

You should say
What it was?
How did you complete it?
Why it was difficult?
And how you felt about doing it?
Well, I have done many things in my life which I found difficult in the beginning, but then with practice, they became easy. For example, I found cooking to be very difficult at first, but now I can cook anything easily by just following the recipe. But one challenging thing I would like to talk about today is when I assembled my own Personal Computer two years back. It was after my exams were over and I had requested my parents for a new desktop. All my friends had bought branded Personal Computers from Dell and HP, which came pre-installed with all the software. However, being a gamer, I was more interested in getting a gaming computer with a more powerful configuration but buying a branded gaming PC was out of my budget. So, I discussed it with one of my techie friends, and he advised me to buy the computer parts separately and assemble it on my own, as it would cost much less than a branded PC. Since I did not have much knowledge about computer hardware at that time, it seemed very difficult to me to do this task on my own. But I still decided to go ahead and started reading a book on computer hardware and also started to watch computer assembly videos on youtube, which gave me a lot of confidence. Through the videos, I learnt a lot about the different computer parts and their functioning. Finally, after I gained enough confidence, I ordered all the components online as it was much cheaper than the retail shops. It took me a complete day to put all the parts together, and basically, the most difficult part was building the CPU. One has to be very careful while installing the processor on the motherboard and then installing cooling fans over it. If this process is not done carefully it could lead to a short circuit, and the processor could get damaged. Luckily, I was able to put it all together perfectly in my first attempt and when I pressed the power button, I heaved a sigh of relief. I was very nervous during the entire assembly process, but I also felt that if I hadn’t read the hardware book and watched the videos on youtube, I would not have been able to do this thing on my own.

21)Describe a time you moved to a new home/school.

You should say
When you moved?
Why you moved?
Where you moved?
How you felt about it?
Well, these days, it is quite common to see people moving from one pace to the other for different reasons. I, too, had experienced the same thing when I was in 8th grade. Actually, earlier we used to live in a village in a joint family with my grandparents and uncles and aunts. The Experience of being together was amazing, and the peaceful life of a village away from the hustle and bustle of cities cannot be explained in words. However, my family decided to move to the city for my higher studies and a better future. It was not easy for all A of us to leave our ancestor’s house to live separately in a city where nobody knew us. We were finding it hard to adapt to the new place. Luckily, our neighbor Alisher was really a friendly and kind-hearted person. He helped us in every possible way to make us feel at ease. Surprisingly, his son Umid was my age mate, and I got admission in the same school where he was studying; and Just because of Umid, I could easily adjust at school and made many friends. In fact, on weekends, Alisher, along with his family, used to take us for city tours. Although we initially missed our family and village house a lot slowly and steadily, we got used to city life, especially visiting shopping malls, cafes, parks, playing in grounds, studying in libraries, and others. 
22)Describe something that you want to learn more.