Is there a module?

Hello. Could you please advise which module to use? I have nodes, for example, sets of exercises. I need to implement a collection of these sets that the user can create themselves, something like a cart in Ubercart. Additionally, there should be a way to calculate certain metrics based on the selected sets, such as the total training time. Is there any ready-made module for a "cart" of nodes? Thank you in advance.