I am very happy to hear that your first day is going well. Caspar is in China this week, but he will be back Thursday. I am sure he will be able to discuss your salary when he comes back (if he doesn't respond to your email before that). He will probably be here in Ekkamai Thursday and Friday, so I would expect him to be in Bearing next week. I hope that is okay. You will definitely get paid a fair wage for your work, and I would expected it to be somewhere between 16-22k/month (plus bonus) - but Caspar has the final say in this.
I am not sure if I will be able to come to Bearing this week due to the high amount of interviews this week, but I will see you next time I come over to Bearing.
All the best,
Anna