It is simply a matter of practicing stability & weight transfer for first few sessions. Do those every day in garage if you can and within a week, you will see huge difference. Just spend 15 minutes every day. Muscle memory will build up in no time.
On concrete floor or wood floor, have you tried standing in a V and then just lifting each foot a tiny bit first just so that you are comfortable with that ?
In V position, once you can lift your foot sufficient, try duck walking as below.
I never tried to stand on grass/sand to be honest and maybe that is why I took time. I don't know but I am alright now.
One thing you should never do is to use those skate mates or skate helpers. Just please don't - at least not in first year.
I have seen many kids/adults trying that one on first lesson and they find it incredibly difficult to let go it. I think it is like a crutch that one cannot let go of easily.
of course its a matter of practice,practice,practice, like anything else it will come if you keep at it,
tried standing on concrete in a V, even tried slightly offset so the one skate is blocking the other preventing it from rolling,
no use, just end up on my backside even if I crouch to infinity with my back screaming in pain, still end up falling backwards,
know its possible to do, people do it all the time, just if you have never ice skated/rollerbladed or skateboarded ever before in life, it becomes a bit of a challenge.
will I give up, no, luckily I brought the Cheapest pair of Skates and all the protection one needs, and it was all under 1K,
so the Jewish part of my brain agrees the cost is almost the same as an expensive pair, with just the Skates.
not going to try the skate mates or what you mentioned, never even knew they existed,
going to do this one way or the other, but will admit to needing coaching and going to sign up to some, to at least get over the fear.
as landing on ones backside, HARD and needing to nurse a bruised rear end isnt fun in the slightest,
am just plain lucky I didnt break a tailbone as some others here have alluded to.
all part of the process, just part of me wishes it didn't have to remind me of a baby giraffe trying to stand up for the first time.
also the crawling aspect, very degrading, like I'm a newborn again, really don't enjoy that bit.