All good mate.
We all had to start somewhere.
No need to touch anything other than find a constant power source under dash, earth, and if you want to add, indicator flash for lock/unlock.
Then wire the keyless entry to the master solenoid in the drivers door as the lock has the switch to unlock everything.
So the keyless will work through the driver door solenoid (master).
If you want to get fancy and more invloved, this unit can do rear door/boot lock/unlock separately, window up option, blah, blah.
I was just happy not having to find the keyhole in the dark.
Where abouts are you located?