Kinda Lost Need Help and Advice

so i replaced my head gasket with felpros one from advance auto.....i followed then haynes guide to the T.Head bolt replacement,tourque to right amount,the whole sha bang

couple of questions.....

1.how can i tell if i put the headgasket on correctly(there aren't any leaks,and there isn't any mixture of coolant and oil)

2.i think i flooded my engine with gas,is the best thing for it time and to check the spark plugs???

3.if the car doesn't crank and idle then what else could be the problem....compression test maybe?

im just ready to get my car back on the road so im ready for anything

btw are the 2000 sohc 2.4 liter galants non interference? i have broke my timing belt twice and haven't had any valve damage