Something about this message (without repeating beginning and ending).
Letters - 26
Duplets - 117
Triplets - 122

When considering position of duplet, or triplet (when encoding is done by several letters representing one character)
Duplets - 59
Triplets - 40

Repeating more than once
Duplets - number of duplets
DJ 2
FN 3
GH 2
JR 2
RZ 2
WY 2
When considering position
FN 2
GH 2
RZ 2

Triplets - number of triplets
JRZ 2
When considering position
JRZ 2

Existence of repeating triplet (which is placed in text considering position) can tell, that chances are not small, that this code was not made with entirely random encoding code.

Letter repeatability when text is shifted by a certain number of characters and compared to the original, by counting matching letters. It is sometimes used to find length of code.
Shift - number of matching letters
32 11
12 9
20 9
40 9
44 9
23 8
60 8
9 7
14 7
31 7
43 7
54 7
5 6
10 6
16 6
22 6
26 6
28 6
49 6
57 6
Statistics may be poor, but shift of 32 stands out. With only 62 letter message and 32 letter code it may not be possible do decode it.
There are codes that deliberately distort these basic methods, to make decoding more difficult.