ECU Tuning Guides

Hi All,

I'm new to the world of tuning despite having had multiple CTR EP3's but really want to learn how to do my own basic tunes/adjust tunes.

My current car ('03 EP3) is now fitted with a Doctronic ProECU-K and loaded with a basemap, and I've got a handle on the software itself, I'm just looking for a resource to teach me basics/intermediate things. I'm not looking to be in the same league as professional tuners, I just like to understand as much as I can about what is going on with my car.