Essay correction

Hello there fellow students,

I got a problem to deal with, unfortunately I am not able to help myself out of this. I was given an essay to write by my english teacher, unfortunately he is way too strict and I am afraid my essay will not be enough to pass my exam.

Would you be guys so kind to go through my essay and correct all the tense/ determiner/ articles/ etc. errors to help me out of this ? I would really appreciate your aid.

The most important person in my life
I chose my grandfather to be the most important person in my life. A reason why I chose my grandfather is, that he is my motivation and inspires me to be a better person. My grandfather's name is Václav Žácek and he is currently 84 years old, which seems to be a really blessed age.
He has been through really tough situations in his life. When my grandfather was a child, he used to live in a village called Ždár nad Sázavou and he was brought up along with his two brothers by their widowed mother. His family was not rich enough, so they could not afford having more than a one pair of shoes. He and his brothers took turns in wearing those shoes while they were going to school. My grandpa had to walk at least eight kilometers a day to attend a school, which I believe was not pleasant at all, while he was barefooted. He attended a tailor school even though he was really smart. Unfortunately he had no other option due to a poverty of his family. He had helped his family a lot until he was forced to attend a military service in the 1949 . As a really smart person, my grandpa went through many difficulties in the military service mainly because communism grasped a power in the Czech republic. He was also imprisoned for two years because he refused to agree with the idea of the communist regime in public. This imprisonment caused him and his family several problems later in his life.
Me and my grandpa have always get on well with each other and we have many things in common such as patriotism and sport. Not only we have been fond of each other since my childhood but he also taught me lots of things when my parents did not have time to do so. He often went for a walk with me to share his knowledge of a countryside. He taught me how to recognize certain aspects of a nature. Whenever we went for a walk, he produced a bow and arrows made of wooden branch. I also remember the day when he taught me how to ice skate. My granddaddy was very supportive and he cheered me up whenever I fell down.
I have always admired my grandfather because of his opinions and experience which he often shares with me. My grandpa loves to tell me stories connected to his life and especially those which are connected to his childhood. We often wonder how time has changed since his childhood and what has altered the most.
It has been really tough for me since I started to attend Pardubice university, because I was used to see my grandpa quite often. He misses me much as well. Although we are happy to see each other at least once a week, we would love to spend as much time together as we used to. I appreciate every single minute I can see him.