My Dream Came True; Northern Lights

<strike>First off,</strike><font style="background-color: rgb(0, 255, 255);"> (I would cut this "first off" because it sounds like the start of a list), </font><font style="background-color: yellow;">M</font>y dream came true yesterday. I, finally, looked up at <font color="#000000" style="background-color: rgb(255, 255, 0);">the</font> Northern <font color="#000000" style="background-color: rgb(255, 255, 0);">L</font>ights in Iceland. Gazing at the lights was always my dream.
<strike>Look<font style="background-color: yellow;">ing</font> back in 12 years ago, </strike> <font style="background-color: yellow;">When I was 20 years old,</font> I lived in Toronto in Canada for three and half months.
What I wanted to do was to go to Yellow Knife<font color="#000000" style="background-color: rgb(255, 255, 0);">: </font><font color="#000000" style="background-color: rgb(255, 255, 0);">t</font><font style="background-color: yellow;">h</font>e place <strike>is</strike> well-known as the<font color="#000000" style="background-color: rgb(255, 255, 0);"> "</font>best Aurora <font style="background-color: yellow;">B</font>orealis place is in the world<font color="#000000" style="background-color: rgb(255, 255, 0);">."</font> However, I did not go there. More specifically, I could not visit there<font style="background-color: yellow;">.</font> <strike>because</strike> <font style="background-color: yellow;">I</font>t was not affordable for <font style="background-color: yellow;">me </font><strike>a man</strike><font color="#000000" style="background-color: rgb(0, 255, 255);"> (</font><font color="#000000" style="background-color: rgb(0, 255, 255);">it is likely affordable for some people, so I would specify yourself)</font>to pay the cost for the expedition from Toronto to <strike>there</strike><font color="#000000" style="background-color: rgb(255, 255, 0);"> Yellow Knife</font>, which is apparently far away on a map. I have dreamt <font style="background-color: yellow;">of</font> looking up at Northern <font style="background-color: rgb(255, 255, 0);">L</font>ights ever since.
The <font style="background-color: rgb(255, 255, 0);">A</font>urora <font color="#000000" style="background-color: rgb(255, 255, 0);">B</font>orealis <font style="background-color: rgb(255, 255, 0);">was</font> truly breathtaking. I was <strike>at</strike> lost <font style="background-color: yellow;">for</font> words <strike>while seeing</strike> <font style="background-color: rgb(0, 255, 255);">(普通の過去形でいいと思います。)</font> <font color="#000000" style="background-color: rgb(255, 255, 0);">when I saw</font><font color="#000000"><font style="background-color: rgb(255, 255, 0);"> <font style="background-color: yellow;">it</font></font></font>. I had always imagined how wonderful they were before yesterday<font color="#000000" style="background-color: rgb(255, 255, 0);">, </font><font color="#000000" style="background-color: rgb(255, 255, 0);">b</font>ut they were more excellent <font style="background-color: rgb(0, 255, 255);">(I personally would use a different adjective like "astonishing" "incredible" "wonderful") </font>than I expected. The lights were green and pink, <font color="#000000" style="background-color: rgb(255, 255, 0);">of </font>which pink seems to <strike>be unfamiliar to</strike> <font color="#000000"><font style="background-color: rgb(255, 255, 0);"><font style="background-color: rgb(255, 255, 0);">rarely</font></font></font> appear. In Iceland, <strike>it</strike> <font color="#000000" style="background-color: rgb(255, 255, 0);">the Aurora Borealis </font><strike>often</strike> seems to<font color="#000000" style="background-color: rgb(255, 255, 0);"> mostly</font> consist of green, according to a local. I was absolutely lucky at that time.
I <font color="#000000" style="background-color: rgb(255, 255, 0);">still</font> have <strike>more</strike> several <font color="#000000" style="background-color: rgb(255, 255, 0);">more</font> days to stay in Reykjavik. I would love to see more <strike>ones by </strike><font color="#000000" style="background-color: rgb(255, 255, 0);">before</font> leaving.

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I am really happy that your dream came true! I would also like to see the aurora one day. You have a very good English ability. I made some changes to what I thought would come across as more natural at times. Overall, a very good entry. I hope you enjoy the rest of your stay there!