Who were the first group of people to arrive in Guyana​

Answer :

Arawak, Carib, and possibly Warao

The first human inhabitants of Guyana probably entered the highlands during the 1st millennium bce. Among the earliest settlers were groups of Arawak, Carib, and possibly Warao (Warrau). The early communities practiced shifting agriculture supplemented by hunting.

https://www.britannica.com/place/Guyana/History