This guide will let you know how to choose your research in GTA 5 Online. You have to follow the step-by-step instructions in this guide to do so.
You will need to go to your computer in the bumper and tap right on the D-pad. Then you have to click on the Fast-track Research button, as shown in the image below.
After that, you have to restart your game and wait for the game to start. Once it is started, you will see a research tab on the bottom right side of the screen. You have to head to your computer and press the A button to open the computer options, go to the Research tab on the left of the screen, click on the Fast-track Research button, and confirm it.
The next thing you have to do is restart your game, and you need to do this procedure until you find wherever you are looking for.