I remember my first game a buddy played me with his dark vengeance set. I was Dark angels and he let me win
That game really did ignite my interest in
40k.
It is commendable you are trying to make it easier for the new guy - this game needs more peeps like you.
There are few things more idiotic than grinding a newbie into the dust just because someone has played 1000 games. Believe it or not after 5 games I was having experienced players cheating they were so friggin afraid of losing ~ telling me some special rule they got to roll each time for armour + cover + invul +
FnP saves, quickly rerolling failed morale checks, zoanthropes are T5 the list goes on.