In my experience 'breaking through' is just as much about comfort, willingness to proceed, and other somewhat unpredictable factors as it is about dosage. Most people don't break through their first time- but don't let it discourage you or devalue the experience. Breakthrough experiences can be the some of the most enlightening, beautiful, magnificent moments of your life- they can also be utterly terrifying.

Sometimes just taking a bath is nicer than going deep sea diving

As for the paralysis, it was likely psychological. DMT does have an interesting body load, and in such a state any presumptions about a physical feeling may easily manifest themselves. Just relax into it, the vibes are all good in spice-land if you let them be.

If it happens again though, maybe consider purifying your extract with a sodium carbonate wash or the like- what was the source plant for your alkaloid?