As you mentioned, it is not advisable for a newbie to do future trading because it is the opposite of spot trading. Especially if they don't have any ideas about crypto trading yet. If it's spot trading, it's confusing to do it, especially in future trading, it's just going to be more complicated on their part, that's the truth.
Then it will really take time to learn it from the beginning before we can experience income from it. Because of experience we will learn whether the result of our trading activity is good or not.