Overall, it is very good. There are just a few sentences were you focus a lot on the demand, which is important to mention that you are aware of that, but you only need to state that once. Here are some suggestions for this issue.
Unfortunately, the professionals' availability are insufficient
through the immediate demand of professionalat the opportunities for of disaster psychological professionals,
This was just a quick read through again, but be careful with that kind of language.
Another thing, if you are from Indonesia, say so. Make it personal for you. You don't have to change much in that paragraph, just note that being from that country, you have a strong sense of duty to help your people. Or something like that.
Overall you are doing great, especially for an ESL student. Keep it up!