...
Go through these tutorials to get a better understanding of ROS2. They are pretty thorough and cover almost everything you need to know. Although there is much more to ROS2 - the idea behind this guide is not meant to overwhelm you but to serve as a guide. There are many neat things in ROS2 such as topic statistics, life cycle nodes, quality of service, and callback groups. In the effort of making this training as simple and straightforward as possible, I will not explore these concepts here. The tutorials I have attached below are HIGHLY RECOMMENDED to be completed before you move on to completing the software training challenge. In fact, I would go far enough to say it is (more) difficult to complete the software training challenge without the ROS2 foxy tutorials. These tutorials are helpful, but you do not need to go through all of them. Only go through the ones that you believe will help you best.