Dorelboss9

I am completely new to coding in java, i am wondering how rendering works.. i saw somewhere else that you need the current player position, the position of the waypoint and the rotation of the player, all of these i can find how to get, but i have no clue on how to render the actual position of the waypoint in the world.. i dont need anything fancy just for it to be visible by the user , also it might need to update its position quite often so i want it to stay in the last known position.. the only help i need is on how to actually render it. i want it to look something like how waypoints from the xaero's minimap mod look.