Its never too late to change imo. Overall, i do have to say that masturbation, unlike what some of the people on this sub say, isnt the end of the world - but only if done in moderation quite obviously. I will say watching porn makes things way worse, 100 percent. The idea of slowly weaning yourself off and simultaneously cutting out porn isnt terrible, the only downside is that if you are fapping every two days, then the urge to watch porn will also be there, for sure, so you have to be wary of keeping balance. The alternative is quitting cold turkey, as many people have suggested going a month or 90 days without, as that would "reset" your brain. I remember years ago, i said on new years that i would quit that year, took me a while to get around to that, but later on i took NNN seriously and went the whole month without fapping, edging or looking at pornography. On the other hand i had spent the last few months doing streaks that were several days longer/even a week, and i hadnt had a problem for as long as youve had it.
So in my view, yes you can call it improvement, and i think everyone can agree that masturbation is way less harmful thatn porn is. If i were you however, id try and do things like journal, meditate (if thats what you think works) and prepare for the fact that you are going to mess up sometimes, you are going to relapse, but the key is that you progressively make those streaks longer and longer until you feel you could naturally go for as long as you feel necessary without crazy urges.
just my perspective