If it's in places like seoul, it's enough money for yourself if you spend it carefully, but I don't think you would have enough to send back home.
$2100
After taxes: $1780
After Health care: $1750
After Transportation: $1500
After Apartment: $500
After food and other expenses you won't have much left.
If you could find a roommate you could probably save $500 a month and since this is a starting salary I assume you will get more money as time went on. Also keep in mind I gave $1000 for a nice place. If you want something a little cheaper and don't mind a bit of a longer commute you could find some small places to live for $500. And with a roommate that would only be about $250 a month.
Another option could be getting a small second job during the weekends if you aren't super busy. My mom for example does data entry for 5-6 hours on sat and sun and makes an extra $400-500 a month. I wouldn't say this is a bad starting salary in sk but it's all about how you use that money. If you like going to the movies and shopping a lot, then you definetly won't have much to send home.
If you have any questions you can message me. I've been wanting to do study abroad in sk and looked up a lot for finances. In the end I couldn't go due to the pandemic.