RPGs are role playing games I believe.
I personally have almost always gone the other way when people have told me what i should do
The odd thing now (except it’s probably not very odd, as Maduro advises this too) is that I actually ask my coach how to do this stuff better, and take her advice!
It’s almost impossible to change someone else’s behaviour, i reckon. It’s hard enough to change your own. So a good chat about whether there are behaviours your son actually wants to change, even if it costs him a lot of effort, might help. And then asking who or what might help him in that.
This might be better coming from someone else though, as the thing about parents (i am one, as well as having them myself) is that we have long memories and tend to stay in our children’s lives.
Which can make it harder to discuss this kind of thing, because as a Brain I know I might/will probably fail, so I often don’t like to tell people I am trying to change something until I know I’m succeeding.
The other thing might be patience and trust. Is his lack of planning etc causing him distress? If it is, he may well want to change that. If not, or not much, maybe just waiting is best. If it’s not broken, don’t fix it. Frustrating though it may be from the outside, pushing may yield the opposite of what you hope.
One of my kids decided eventually for himself that he was spending too much time online and not enough time with real people. I had thought that for years before he did, but there wasn’t much I could do about it.
(Plus, where am I now? His justification was mostly sound and it is of course true that online friends are also real people etc. I am a real person and I’m online, and so is he.)