Make a basemap is not rocket science. You take the stock map, you scale the fuel to your injector, you add boost column and retard the timing (the software do it).
Usually, it will be damned rich (it was in eCtune, a bit less with crome) like 10.5 so I remove 5% gas in all cells. It sit now at low 11. Might not apply to your motor tho. b18 are easy to tune
Idle will be too damn rich, so you lean it. Give a little gas like 2k rpm and let it go down to see if the car want to die.
You don't really need to fuck with timing on a basemap, you only have the "easy" part to do.
My car pulls hard everyday since july and still on a basemap (little better than a basemap, but not much). Again, its a b18a1 which seems to like amateur tuning.
Good luck