For a long time the 'L' trick didn't help me. I'd just think 'but which way does the L go?'. It could be either.
When I was learning to write I would get letters round the wrong way, and even occasionally wrote whole paragraphs from right to left.
That worked itself out by 7 or so though, and I never struggled to read. Telling time was fine if the numbers were on the clock but impossible if just looking at the shape of the hands. Also fine now.
These days I think 'which way would I read that' and that mostly works, but recently got caught out because the gears on my bike went 5, 4, 3, 2, 1 rather than 1, 2, 3, 4, 5 and told my child to cycle on the wrong side of the path. 😣DP corrected.
Giving directions as navigator abroad similarly difficult, as I think of left as the side of the road we're on, rather than actual left.
Left handed, good academic results, professional qualification, no problems with tables.
As far as I know not ND, though, like many, I sometimes wonder.