If using Cheat Engine as a memory viewer, it is not difficult.
1.
Download and install Cheat Engine.
2. Run pcsx2 and load the game.
3. Run Cheat Engine.
4. The color of the button on the upper left screen will be changing. (Red -> Green -> Red ...)
5. Click the button. "Process List" will appear.
6. Select "xxxxxxxx-pcsx2.exe" (x is hexadecimal)
7. Click "Memory view" button on the center left screen. "Memory Viewer" will appear.
8. Click right mouse button on the down-side screen, context menu will appear.
9. Select "Goto address".
10. Enter the address "2" + right-hand 7 digits of the cheat address.
e.g.
patch=1,EE,xYYYYYYY,extended,ZZZZZZZZ -> 2YYYYYYY
patch=1,EE,00836BC8,extended,0000005F -> 20836BC8 (The first digit must be "2")
11. In the case of the attached image, the values are below.
If type
"0" code, the value is 5F. (1 byte)
patch=1,EE,
00836BC8,extended,0000005F (The cheat what you want)
If type
"1" code, the value is 605F. (2 bytes, not 5F60)
patch=1,EE,
10836BC8,extended,0000605F
If type
"2" code, the value is 6261605F. (4 bytes, not 5F606162)
patch=1,EE,
20836BC8,extended,6261605F