You can consider attending the Community Emergency Preparedness Programme (CEPP) which is a 3-tier structured public education programme covering the following: 

Tier 1 - An online module that can be done in the comfort of your home;
Tier 2 - 'Response Ready' module, an approximately 3.5-hour module (with e-learning and face-to-face components) covering first-aid, CPR-AED, firefighting and an overview of SGSecure. This is conducted at our Division HQs or at the location of a company;
Tier 3 - 'Lifesaver' module, an approximately 4-hour module which you can register for if you have completed the 'Response Ready' module, or similar courses. 

The CEPP is conducted at no charge across all 4 SCDF Division HQs. For registration and enquiries, you may contact the Division HQ nearest to your home/office/school:     

This information is sourced from SCDF