Base64 decoding from old wallet.dat

hello! I found the wallet.dat file on my old computer, but I no longer know the password. Now I’ve been reading Base64 code on forums and some ideas and things about converting this code.

Unfortunately my knowledge is limited and I am now not sure if the file is corrupted.

Here’s the Base64 code (not complete!):
wKOCZEPaRssAQAAAAAAAAQAAAAAAwtmcm9tYWNjb3VudAABbgM4MzkJdGltZXNtYXJ0CjEyOTkxMjQ5NTYAAAAAAAK998GAAAAAjAAECdHi6UcWqMkoj92i8H4xWg/AlJx55Qa0EIouIrCN5JjQvYgAA ......

Base64 code consists of a total of 5,013,504 characters!?

When converted, the resulting text will look like this (not complete!):
=T����|`-;:6F(*w)�����������fromaccount�n1034 timesmart 1300202056�����}`��#�tx�&vQ,P$=/S~6d5ubGb~Y(���1(X1~0$v fx)���G0D d(ꎹka|OvkӘǟXюz ((I=QVP+o.ݑGAfQLMFjw)w)w aIO϶4}uwHX> !``L���vbܶ"~`4gv)p@4����v.UN<I3VL

Can’t see your password here? Or is the file corrupted or something?