For LSD, you'll be tripping hard for 5-8 hours, depending on dose and other factors. LSD lasts for a total of 12 hours, but once you're coming down you can function pretty normally as long as you don't stare at the breathing walls lol. After the LSD wears off all the way you might feel energized and ready to go or you might feel completely exhausted, so plan for that. MDMA (assuming the pills you get are, in fact, MDMA. Street "ecstasy" is notoriously impure and inconsistent.) Lasts 5--8 ish hours and chances are you will want to SLEEEEEEP after you come down. If your parents allow you to drink you can easily pass off your hangover as an alcohol hangover. Some people handle MDMA really well and don't really get a comedown or hangover, other people get a crushing comedown and/or a terrible hangover. Most people, though, don't get a comedown or hangover their first time. Now, if you know for a fact that your parents are not going to bother you for awhile, neither LSD or MDMA are going to make you go insane, so you can just hole up in your room or w/e and take it. MDMA is a VERY social drug, though, and while many people enjoy taking it alone, almost everyone whos ever taken it will tell you to do it in a group for your first time. Try to be with a group of people where everyone is taking it. If that's not possible, try to be with a group of people who are OK with you taking it and won't be annoyed by your nonstop talking. Vicks Vapor Inhaler is a MUST
Happy tripping!