Well, just as long as you're not trying to emulate this guy (did an internet search to calculate dose required to murder wife)
https://www.bbc.com/news/world-australia-38258263
Seriously, many of us T1s have overdosed on insulin by accidentally injecting short acting insulin instead of our long acting basal dose. It leads to a scary drop in blood sugar and much panicking and scoffing of sugary food.
In practice, most people get rescued from night time hypos by their livers (or by an ambulance when their panicked partner watches them appear to have an epileptic fit in bed). If your blood sugar goes low then your liver will pump out sugar, so you'd have to be pretty unlucky to actually kill yourself. (I'm not saying it never happens, but it's pretty rare).
But hypos are the thing I hate most about T1. And in the honeymoon period, it's much harder to avoid them. It will get easier.