1. Both "starting from today" and "starting today" sound natural. 2. While "If my writing is wrong" is not grammatically incorrect, it sounds awkward. You can get the same meaning across with phrases like "If I make mistakes" or "If my writing contains errors" or "If my grammar is wrong." 3. For the word "fulfilled," it is incorrect to say "I was very fulfilled" or "I am very fulfilling." You may say "I felt very fulfilled." You may also say "Mine was very fulfilling," in which the "mine" refers to the summer vacation. Since your previous sentence asked about the summer vacations of others, it makes sense to describe your own (and use the word "mine") in this sentence. 4. The words "went" and "domestically" don't match. "Traveled" sounds more natural. Note that "traveled" is the U.S. spelling and "travelled" is the British spelling. This is just a regional difference. 5. "For example" is a little awkward. Since you're describing your travels, going to Karuizawa is not really an "example." You would be fine deleting this phrase. 6. "So" is not the right transition before "we had a BBQ." "So" implies a cause and effect and would go before the effect (example: "I had a lot of homework. So, I slept late." The cause is the fact that I had a lot of homework, and the effect is sleeping late). You can do without a transition since you're just detailing your story in order. 7. Both "It was a good experience" and "It was such a good experience" are correct. I chose the second one because it emphasizes your point better. :) 8. Both "I hope I get to go there again" (I hope I'll be able to go there again) and "I hope to go there again" are correct. But "I go to there" is incorrect. Great job with this!