Projects will continue to be listed through midnight January 17.
Since you can apply to a maximum of 3 projects, you should wait until they are all listed before you start applying.
You can choose to scroll through all of them, or filter them based on whether they are paid or unpaid, whether they offer enough hours for you, etc. For example if you want to see projects that require somewhere between 8-12 hours a week, click on both the 6-10 and 11-15 options under "Hours?" and press the filter button. If you're using a Mac you can select both options by holding the shift while clicking on the options; if you're using a PC, you hopefully know how to do this.