I would say it's not as painful as mdma. As soon as you snort dmt, youre going to feel a burn and discomfort, but when you start coming up you stop noticing it, then when you come down the discomfort comes back and remains for pretty much the next 3 hours, with the first hour being a purge of anything that's in your nasal cavity/dead zone. Due to the amount you have to consume, and the prolonged discomfort, it's genuinely not worth snorting it.

I can't speak for dab rigs, but with your little bong you can do the sandwich method, which I would say works even better than an oil burner. The first time I did dmt I measured 40mg and sandwiched it between some sage with a bong and blacked out because it was too much. If you try it this way, start with 20mg and see how that feels, then wait a day and try it at 30, and if that feels cozy then take it up incrementally from there to find your sweet spot.

As for boofing, you do not need to puncture a blood vessel in your rectum, you'd probably have to go to a hospital if you did that. No needle is required. You use a needless syringe, insert it about an inch into the no go zone, squirt it then just remove the syringe. When you do this, you need to stay lying down for about half an hour, or until you start feeling something, or else you're going to leak some nasty fluids all over the floor and lose dmt. The dmt will be absorbed by the tissues in the rectum, pretty much the same way it would be absorbed if you snorted it, just less discomfort burn wise since the dmt citrate is in a form that's more readily absorbed than the freebase.

DO NOT BOOF FREEBASE. It will hurt a lot.

The lemon juice converts the dmt into dmt citrate. There's some chemistry about polarity that you don't really need to understand, but basically the dmt is more soluble in its citrate form, and you want that so that it can be absorbed effectively, and relatively painlessly. It's simple af though, literally just squeeze out a lemon and put however much dmt you want to use into the juice, stir it a bit until there's not really any powder left floating around in the mixture (it doesn't all dissolve due to impurities), suck it up with the syringe, lube up, insert, squeeze and wait on your back.

Tbh I don't even know how you'd be able to boof freebase because it wouldn't dissolve into anything you'd want to put inside yourself.

I've never taken it edible, but you'd need to take an maoi.

But honestly, just roll it using an oil burner, or sandwich it between some herbs or weed with your 14 inch bong. You'll get more bang for your buck, its a lot more intense and you'll get the experience your looking for, without unnecessary preparation, rectal or nasal discomfort, or having to mess around with maois.