Hey I've built 2 of the rcp jets, and no matter how light you make it, an 1800 with a 6x4 is gonna be underpowered... My f35 couldn't climb at full throttle with that much.. Best is to get a 2200 kv with a 40a esc, gives enough power for some moderate flying and later you should switch to the NTM 2700 kv....
Also when rc powers say "beginners Park flyer" they assume you have some knowledge about rc flying in general and have got stick time on a slower more forgiving aircraft....
That's just my 2 cents worth