Phew! Don’t buy copy-paste templates of letters as it may not please the Immigration Office.
When you write a letter to the Immigration Office, be sure to write everything you wanted the Decision-Makers to know as if you are there speaking before them. Most of the time, by you writing something which is really you and not based on a template, the Immigration Office may be satisfied that you have a good grasp of the language skills and you can integrate in the country and become economically active, if the visa is granted.
You can explain the following: