My two cents .......... random bits and observations .......
Trust your gut just a bit more than the judgments of others.
Listen more than talk.
Don't do the "I'm here I am and I'm important" thing. It offends and backfires.
Slow down.
Remember that advice given bars is usually from people under the influence and that often drama trumps fact.
Remember that in most cases the real-people you want as friends probably already have friends and settled lives and aren't out there desperately courting your company. Pretty much any time somebody rushes you for new best-buddy status they are on a hustle for something. Over time you will meet people that are genuine and caring. There are many here.
Even though this is an English-speaking country, many times the language is used differently than where you come from. Assume that you might not understand and clarify communications.
Be glad when things happen on time. Don't get mad when they don't.
Don't wear a bikini walking down Middle Street.
Enjoy the beauty, the weather, the people, the place ...........
IMHO Belize isn't perfect, but it is a good place and a healthy place and for me it is home. It may be the same for you............