There are two schools of thought on whether leisure time should be used in self-improvement or it should be used as a time to rest your mind.
this is too short as an introduction. Open it with a motivator and you should first give some general information about the topic and then write the thesis statement.
Leisure time gives an opportunity/chance
is the best time to find one's interest and discover him self/herself .
In conclusion, there is nothing wrong in both ways of thinking. If someone feels that keeping the mind for some time is the best thing to do, it's the best thing. On the other hand nothing wrong in engaging ones brain during leisure time.
In this type of essay you should first restate the thesis statement in the conclusion and then give your opinion in order to show you are in agreement with which viewpoint. Finally write a clincher.