Need help & educated on tunes.

[Dynogt17]

Okay. I need pointed in the right direction where to get more info and educate myself on tuning( not to do anything myself or even touch anything ). My truck is tuned now. The issue i have is of a morning 70ish deg outside it starts up okay. Through out the day runs good except at a stop light or when i park the truck it lightly rocks side to side. When i start it if its hot like 97degs this Sunday. It runs a little rough and has a slight rattle type sound until it warms up(130+ deg coolant).. Mainly looking to educate myself. The imap and ambient pressure were new 1 month ago. Could i have a sensor issue or does this have to do with ecm modes?