I apologize in advance if this sounds stupid to most of the members here.

to start i have a 2008 saab turbox with a v6 2.8 liter turbocharged engine in it. currently have the stock tune flashed in and mods done are a short ram intake and a catless 3 inch downpipe and midpipe. I am entirely new to the tuning process but not to the automotive world, i have been a tech for 5 years. My question is where do i start my tuning process? scale the maf sensor, adjust the fuel injector tables, etc? I know i need a wideband o2, what is reccomended to use with hptuners? I started some data logging with vcm scanner and have noticed that my stft is pinned at -50% all the time and the timing advance is all over the place. I can upload a log file if it is needed. also can I adjust boost pressure with hp tuners and when should I do that? before the whole tuning process or get everything running good now then up it after and tune accordingly. Thanks , if you need any other info feel free to ask for it if i forgot to include it