If you are new to the scene, why don't you give it a go on its own first? Without tolerance, you'll have a good 4-5 hour experience and can keep the feeling going to some extent with a bit of weed for the comedown. This is the safest option and a very nice experience on its own. IMO, there is no point tweaking the experience when you're not even familiar with it yet! FYI, speed is commonly used with MDMA. I personally don't like the combo, but some do. If you decide to go for such a combo, lower the dose for both substances to reduce toxicity.
Also, give it 1-3 months before your next experience, no matter how amazing your experience will be.Too many people, like me, have ruined all the fun by using it the wrong way. Don't make the same mistake!
Good luck