That sort of stuff is far from beginning level and requires a lot of experience.. at least for aimbot hacks.
You can start by making a Flex Patch, once you have your Flex hack working you need to install a few things and wright some simple code.
You will need..
• Theos to make the deb/tweak (hack) itself
• FlexConverter to make it easier
• The Flex Patch you want to turn into a tweak (deb)
This is called an MS hack, a basic type of hack.
You can later add a settings panel or whatever its called.
You can later move on to MS Hook hacks and cracking the binary and hacking it in IDA to create more advanced hacks (like aimbot, but aimbot would be hard to do)
You can find more information here.