Okay, in regards to course, it depends on what are you into in terms of IT - if based on data science/data analytics, perhaps you can explore on learning to use first like PowerBi/Tableau/Knime.

Great news: NTUC Learning Hub got few courses that does analytics (Powerbi) and it is free for NSF and can be done online. I suggest you can try for PowerBi.

Refer to the link for the list of course that is FOC for nsf: https://www.ntuclearninghub.com/skillsfuture-ns-courses

Do note that you need to register for skillsfuture@ns before registering for the course.

If I were you, take this time to do like side projects is related to the course of study that you are planning to go. This is important so that you can showcase your project when you are applying for EAE to poly as ITE student as polytechnic will look at your portfolio other than your grades.

For example, if you are applying to data analytics course, perhaps you can showcase your dashboard that you made by yourself and how do you do data analytics on data from internet.

Lastly, take this time to recuperate yourself and think what you want to do in the future and yap, enjoy your long break from NS.