Will my and my friends' RC cars signals overlap with each other?

Hi everyone, i'm new to this hobby and i'm looking to buy a cheap RC car to race with my friends. Problem is, it seems that every car i can find online (i'm mostly looking on amazon, since i'm looking for a preassembled car that's ready to run) shares the same frequency of 2,4 Ghz. Now, i read on the subreddit wiki something about "frequency hopping" and my understanding is that with this new technology there shouldn't be any problems even though the cars share the same frequency. Is anyone willing to PM me so we can discuss it further? For example, how do i know if the car im going to buy can "frequency hop"? Thanks in advance