As said, forget about the 61 cm mast.
The 71 can be used for ultra marginal wind later, but if you will be into racing somewhat, it will also be useless.
For freeride and "just getting out" it is perfect for direct onshore marginal wind though
So if you want to race even just a bit, the 61 and 71 can be used for starters, but you have to get rid of it quite fast though.
For freeride as said, take the 71 as much better for learning, and you wont outgrow it in some conditions where needed.
Kites, you dont write anything about your current kites?
Use these for starters, even if you got a 12 m2 heavy LEI, it will work fine when learning, as you got to have somewhat more wind here.
Later it is different, and dont ever use a LEI bigger than 10 m2, unless it is a one or no strut.
And with your liking for race, these dont make sense anyways, so go with a foil kite.
IF you are at a point where you change your whole kite quiver anyways, I would still go for the foil kite(s) right away, and learn to handle these.
You will learn this faster than you learn to foil
Especially when the foil kite is smaller than 12 m2, easy peasy.
The Flysurfer speed 5 is a great kite, but somewhat "in the middle" meaning not performing for race, and too heavy for lightwind and freeride in the bigger sizes, so eventhough awesome for most kitesurfers, it is not for hydrofoil IMO.
The Soul 8 m2 would be just perfect for "most" I think.
It is quite "strong" compared to more race oriented kites, so if you think it is too fragile for your beach, I think you might have another problem regarding "what you want" now, that you have to settle first.
If I were you, I would simply start with your current kites whatever they are (doesnt matter, they all work when learning), as this is key for easy learning, and you dont ride in sub 10 knots anyways - and above 10 knots everything will work.
Alpha and Breeze in 11 m2 will both be fine now too, but why change, you have kites now right?