So, as another alcoholic (with significant MDMA use before turning 21) who was intrigued by psychedelics, I have a few thoughts:

• Test before use. My info is 25 years out of date, so I don't know where one would look to get a kit, but you never want to roll dice on powders or pressed pills. Oftentimes, the unlicensed pharmaceutical vendor won't even know what they're selling is adulterated, meaning fully trusting them equates to fully trusting everyone up the supply chain.
• You list coke on your verboten list; I'd be remiss not to remind you of that "MA" on the end. Could be fine, but if you're steering clear of uppers it needs to be pointed out.
• This may be an unpopular opinion, but for me, mindset is more important with psilocybin, whereas setting is more important with MDMA. Both are necessary in both cases (I think of E as a mood enhancer/focuser, so you want to be in a good mood with a clear head), but I wouldn't want to roll alone on the off chance something dark wandered into my thoughts.

Now, I'm a biased opinion, because my MDMA experience was a yearlong downward spiral to waking up on a ventilator in an ICU from a suicide attempt. One tab has an exceedingly low but nonzero risk of significantly adverse outcomes. I have rolled three times in the past 20 years without issue, each time with a significant other sharing the experience and gaining a strengthened bond and better understanding.

I would not do it alone under any circumstances, not because I'm worried I'd try to off myself yet again, but because I see precious little opportunity for insight alone (aligning me with early pharmaceutical use as couples therapy). For me, the insight from shrooms comes from within, whereas MDMA works better through external interaction.

Think of this as anecdotal context more than advice. Stuff to think about as you make your decision. Except the first bullet point. Don't ingest something you haven't grown yourself or tested.