Hi Martin, thank you for the compliment.
If the ball starts off straight or slightly to the right, we know your swing path is fine. The ball curving right towards the end is the result of an open club face. It only starts to move right as it slows purely from momentum forces. As it slows the effect of side spin is more pronounced.
To solve that there are 2 ways of doing it, one simple way and one more complicated. Let's start off the with simple solution but feeling the club square or close at impact and through the release.
To do this is simpler than people think. Try it with a slow practice swing first and then speed up ... At impact feel as if the palm of your right hand rolls over through impact. Make the right palm the focus of your feeling ... Also make sure your left arm and wrist for a line through impact.
Sounds complicated but once you make some rehersal swings feeling your right palm roll over (do that first) and then when that's working work on getting your left arm and wrist to form a line ...
Once you do that and start to hit golf balls you'll either hit it straight or hook it. As time passes, you can reduce the amount of roll over to manipulate the ball flight.
Any problems - post again.