Hey Everyone

so i had a power fc installed and tuned about 2 weeks ago,
and now i am experiencing some problems.
First of all im no ecu expert or mechanic so be nice,
im only 19 and still learning lol.

First problem; starting the car every morning before heading to work , it struggles at a really low rpm for a couple of seconds before idling at a normal RPM, is this normal for a cold start, im just worried it could be damaging my engine because it dosent sound very healthy.

Second problem; a lag in acceleration, most noticeble when taking off in first gear there is quite a lag from when you push your foot on the accelerator until when the rpms increase and is quite annoying.

If any one can help thanks in advance.