well...full time degree studies is definitely out for u, unless u can bring your diploma GPA to 3.5, bcos tats the avg GPA i heard to enter for all 6 local unis.
my O-lvls were B for eng/chi/emath/combsci, but i failed my last 2 subjects. my poly GPA around yours.
i was accepted into unisim PT biz degree in 2014, but declined due to personal reasons.
provisionally accepted for 2019's jan intake pending final offer. if no final offer, off i go back to FT job hunting again

u still have long way bcos u havent serve NS...
for your case, pls dont take engineering @ uni level. u'll die at it since u got D7 for emath