You will learn way faster with straps, no matter if a strapless expert on surfboards
But it can be learned strapless, it just take longer, or extremely long (individual).
Some might say "they learned without" yes, but in general noone learns fast when trying without, and here everybody who thought "I can do that" because they are excellent surfers strapless, mount straps after having wasted the first day doing NOTHING at all.
A few will say I am wrong, but I know, looking out over all the new hydrofoilers, it is so in general.
You need the straps, at least the front, to position the board and yourself.
You also need the straps because the timing when starting is essential, you HAVE to dive and get up at the exact perfect instant before the foil sinks more vertical - which takes time to learn so you will mess around going nowhere while learning this.
With strap(s) you can just position easily and comfortable, keeping the board tilted, and you got all the time in the world and can try with small dives from the kite, to avoid being pulled over or getting too much speed - a soft and less risky start
Or you can of course go full on full power with speed, using the straps to keep everything "right" - but would not recommend this ha haa - but some does it this way (and take the beating, but they learn)
Straps are risky indeed, not on a surfboard or TT where they are harmless, but on a foil with the lever (it does not move if you do, like the other boards), your ankles are at risk - particularly when learning and discovering this for the first time.
Have you ridden big finned raceboards earlier ?
If, then it will be pretty easy and not much risk,as they behave almost the same way.
There is another solution called "Foothooks", which is half a strap, and you just slide out instead of getting stuck.
One or two of these, and you will learn fast and without the risk.
Only problem is, not many (I dont know any, but there are some on this forum) use the hooks WHEN they have learned, it is either strapless, or straps for jumping and freestyle (and speed/race) - so many dont get to them as not easy to find.
So yes, learning strapless will hinder your learning, some or a lot - but be more safe no doubt.
Hooks (not too short) will give both: You learn as fast as possible, and safe
Welcome to a new fantastic world - and dont be put off by how difficult and sensitive and impossible it seems when learning and your foil goes rodeo, suddenly over time your body and muscle memory will click and you can do it easily later, no problem strapless.