The more a customer knows about you, the higher the chances that they will accept you. Add any information to your profile that you can provide.
Many CORK helpers choose the wrong job. Take the time to choose the right one for you. See if it is too far away, is one of your competencies and the other comments from the customer. Don't take jobs that you can't do.
As long as you have earned less than 2,300 francs on KORK as a helper, you do not have to deduct any social security contributions from your earnings. As soon as you exceed the limit, you have to register your self-employment with the compensation office.