So, I'm brand new, trying to get into tuning, car enthusiast and wanting to tune part time for now but hopefully full time in future.

I'm playing about with winols at the minute, but would like to know where everybody got the knowledge of their do's and don'ts. I know there's company's to buy maps off but surely every engine has different limits, do people consider mileage when applying to each car? Is there any info on specific engines that I could learn about or is it all passed down information and trial and error (rather not find out the hard way ha) I have to start somewhere I guess so any information would be a help as always