Well if you are prone to bad trips at this point in time you should definitely avoid this compound. Better go for some DMT or ketamine imho. 2-Methoxy-Diphetidine is one of the most dysphoric substances I have tried next to opioid receptor antagonists. :D
Almost all my experiences have been plain horrifying or difficult at best. I just did another 250mg intravenously the other day and when I came to I kept mumbling that I wanted to die for quite some time. All was good when I was back to baseline, but I'd strongly disadvise trying this compound as your first dissociative. Go for something smooth that is easy to handle like the two compounds I mentioned. Ideally you'll have someone with you during the first trips. With either substance, shoot for nothing other than a breakthrough dose which reduces any psychological discomfort to zero in my experience. If the aforementioned substances are not available to you, you could look into NEDPEA aka ephenidine. It lasts very long though so a possibly difficult experience will have to be sat out for hours. Definitely have a trip sitter with all these dissociatives, some people start moving around spontaneously or get the urge to redose in the most reckless fashion.
EDIT: Come to think of it, I redosed during that last 2-MeO-Diphetidine experience. I simply grabbed a few grams from my bag and dumped it into a glass, added 10ml of water and filtered through a 220nm filter. I have no idea what the how big that second dose was, but it does explain why I wanted to die upon coming back from it lol.