I suppose I'll look into it (i have no experience with this stuff but worth a try). Anywhere to get started?
First, you'll need a "hacking program" and select a game to search for. Sometimes it's tedious to select the "required process" for cheats rather than the "application" (if there are several, you'll have to switch processes until you find the right one).
To learn how to find the items you need, it's easiest to start filtering with items that are plentiful and can be quickly increased. For example, dirt blocks. Once you find dirt blocks and verify that their quantity changes in the game, and next you can then search for other items in a similar range.
Or, after filtering dirt blocks, you can look at the surrounding values using a special viewer in the program you "cheat" with. Then try to find and change the surrounding values, such as wood (or/and etc.). This will generally allow you to change any value of any items you have, but it's almost impossible to find and change the quantity of items you don't have.
I recommend saving frequently while searching for values (and especially when changing them), and in advance. If you change the wrong value, the game can crash; be prepared for this; that's why you need to save.
Also, changing the map while searching is likely impossible; the values will change addresses.