Swisswingfoil Sorry to hear that you did not get the right information, of course it is always a bit tricky to give 100% the correct info without knowing the riding level/local conditions of riders. So for example, you mention you are learning to gybe - so the 1400 should be a good foil for you for lighter winds, to get the gybes right - but obviously when it is windier, this will not work. My wife and daughter both learnt on 2000/1750/1500/1250 and now my wife is even down to the Carve 2.0 650 - obviously we are lucky to both work at the company and have access to the gear/I can help her and my daughter learn since I have been doing it since 2019. But it is definitely a gradual reducing of size as your skill level increases, until you find the "perfect foil(s)".
So I would suggest for now, to get first theCarve 2.0 1100, as this should be a good allrounder which you can use in almost all conditions at your weight, get your gybes and maybe tacks working. After that you can look at going further down in sizing.