There is some cross tolerance between mdma & psychedelics, I've failed to get any effect from mdma shortly after regular mushroom use before. I'd treat it as a psychedelic & try to apply similar rules to each. You're going to get reduced effects pretty quickly if you do it more often than weekly for any length of time. If you use every weekend then you'll start to get problems midweek (anxiety, paranoia, depression) after a few weeks. If you don't want to start having any problems then I'd say no more than about 4 times in 3 months.
I often break that rule though & use frequently for about 3 months, then take at least 2 months break. After 3 months of regular use of mdma and/or psychedelics I hit my limit & stop, but I might be a bit of an anxious mess for a few weeks after.
Any mental problems seem to be fairly easy to notice once you know what the drugs do to you & they tend to go away fairly quickly after I stop using too.
Your first trip on mdma, lsd & mushrooms should be special & you don't want any cross tolerance to mess that up, so I'd wait at least 14 days between each to make sure I get the full effect & have time to deal with the experiences. Make sure you test your lsd too.
Psychedelics are good for being outside in nature with friends who are also tripping, maybe best waiting for good weather & plan a trip out somewhere. MDMA is fantastic for dancing to loud electronic music.
Eat well for a few days before & after you use these drugs, but don't eat too heavily immediately before. Make sure you're drinking enough (not alcohol), but don't drink stupid amounts. Smoking cannabis will make psychedelics much more intense, don't try to use it to relax if you're tripping too much.