Keep it simple.
Keep all the levers forward until a safe ht and speed is attained, don't start playing with things too early while you should be concentrating on flight path control ( especially on a dark night )
I was right seat for a low time friend in a PA31 a while ago, after T/O at about 400' we entered cloud while he tried to set CLB power whilst turning onto track. I had to assist him back to less than 30 AOB. He was lucky I was there.
At the end of the day do WHAT THE MANUFACTURER SAYS IN THE POH.
simple.
And if that's too hard then
1/ don't fly at all or
2/ fly a single