It is never too late it just takes more effort once bad habits are established
make sure all letters except "e" start at the top
I've been told by an OP that the traditional tripod grip isn't important and unless the grip used causes pain or the writer feels tired by the effort change isn't necessary
Curly caterpillar family
Anticlockwise movements
c round
o round, round and join
a round, up, down and flick
d round, up, up, down, down and flick
g round, up, down, down and round
q round, up, down, down and tick
s round and round the other way
f round, down, down and round - across
e across and round
one armed robot family
down, up and over movements
r down, up and over a bit
n down, up, over, down and flick
m down, up, over and down, up, over, down and flick
h down, down, up a bit, over, down and flick
b down, down, up a bit, over and round
p down, down, up, up, over and round
k down, down, up a bit, over, round, out and flick
long ladder family
mainly down and round movements
l down, down and flick
i down and flick - dot
t down and flick - across
j down, down and round - dot
u down, round, up, down and flick
y down, round, up, down, down and round
zig zag monster
diagonal movements
v down, up
w down, up, down, up
x down, stop - down, stop
z across, down, across