When you have identified the course and school that you wish to attend, you must contact the school directly to apply for admission.
When the school has accepted you (and all formalities and paying of fees have been completed), the process of applying for a residence permit (depending on your nationality) can begin.
The Danish folk high school will begin the whole process by completing part 2 of the ST 1 document and attaching the required documents, if any. The school then sends or gives the form and attached documents to you. You then complete your part (part 1) of the form, attach the required documents and submit the entire original application to the Danish embassy in your origin country (or in the country where you have resided permanently for the past three months).