Hello!
I’m in Kyoto today. It’s crowded with many foreigners, but I’m enjoying the Japanese culture!
Alternative Version:
Hi!
I’m spending the day in Kyoto. It’s quite crowded with tourists, but I’m really enjoying the Japanese culture!
Short Tip: Use “many” instead of “a lot of” when referring to countable nouns like “foreigners”. Also, “spending the day” is a natural phrase when you're talking about a specific activity or location for a day.