just this one time I will refrain from being sarcastic and giving you the link to the google page (yeah, in all honesty it is kind of difficult to find a clear and short page about this) and I will try to share some usefull links.
wikipedia offers a basic and understandable description
and sensei of course offers a nice comparison, but some understanding is expected as a pre-requisition.
I will try to sum it up for you and maybe someone more skilled will then correct my mistakes:
in Chinese rules (what you need to know without some minor details):
- captives do not matter (no points for captured stones)
- only one player's score is counted
- you count surrounded territory AS WELL AS the stones themselves
- and if the result is bigger than half the board + half komi (which is usually 7,5 - in total - in chinese rules) that player wins.
Therefore playing in your own territory changes nothing. (stones are counted together with territory)
But I do not think you need to bother with different rulesets. As far as I can tell you seem to understand Japanese rules. The only problem you were not clear about is that you DO NOT need to completely surround all the stones in your territory for them to be counted as your captives. That's it. No need to bother with all the different details.
If you wish, send me a friend request or a challenge and we can play a game together and you can ask away about everything that is not clear enough to you :-). It is always better to learn from experience than trying to understand theoretically.