Mr. Thanusakorn,
Of course sir, you are the one to decide when its best time for you to start.
Even if you activate today there is no difference, the most important is when you will start to trade.
Today there is no market, you can do all the procedure today and start trading tomorrow, or the other is correct, activate your account tomorrow.
The most important is for you to feel secure and safe with your funding, and this is my job to help you with any issue you might have
Best Regards: