The weather is already getting hot; is it too late to start hair removal now?

Now that the season for short sleeves is approaching, I'm starting to get worried about hair removal, so I have some questions regarding the procedure. If I start now, will I be able to complete the full set of sessions before summer? I'm also curious if the facilities at the Goyang branch are clean, and if anyone knows if it's difficult to book an appointment, please share!