When you write your drafts, be sure to leave room for comments from the peer-editor (or teacher). Traditionally, that has meant "wide margins" and "double-line spacing."
Try to leave a 3cm white space on the left and right of the page in your drafts. (This is why I suggested a notebook at least B5 size). If you have lined paper, it probably has a line margin on the left. It might or might not have a line on the right. You might want to leave even more space than the line indicates.
Double-line spacing means that you skip a line when you write
if you are writing with lines, or that you change the line-spacing
option in the word-processor so that it looks more like this.
In MSWord, line-spacing is under the Format Paragraphs section. However, line spacing in MSWord is dependent on the font-type you use, so Arial, Times Roman, and especially, the Korean-style (Korean-named) fonts may have more or less spacing between lines. So if "double-space" or "1.5" doesn't give you the gap you want, you can control it by saying "exactly 20pt" or whatever. (So if your font is 10pt, 20pt is double.) There is a good grammar-check in MSWord, see http://rjdickey-write.blogspot.kr/2012/06/msword-grammarcheck-settings.html
In Arae Hangul (HWP) they use a percentage system. Standard in HWP is 160, which looks good for hangul letters but is about 1.5 for English. 110 is about right for single-space in English type, so 200 or 220 will be double-line spacing in English. See more about line-spacing and page formatting in HWP at http://rjdickey-write.blogspot.com/2012/07/hwp-page-formatting.html