Embassies
Trinidad has a bad reputation it has a shocking high murder rate, but if you are sensible and stick to the main areas, you shouldn't have a problem and will find the locals incredibly friendly. Avoid any ostentatious display of wealth, and don't wander down dark backstreets at night on your own, and you shouldn't experience any problems at all.
Wear sunblock, even in early morning or late afternoon, since Trinidad is very close to the equator.
contact
SIM cards are easily available.