I'm no expert but went to pedal revolution , then watched a YouTube video , as you know everything is on there.
But done mine , removed old one , then checked tube never had item to puncture , fittted one side then put little air in tube , and do other side using these little plastic things to flip tyre into rim .. make sure if have direction arrow depending on brand I suppose .. last bit the tyre is real tight but should flick on , then pinch it and check the tube isn't nipped by the tyre and inflate ..
Like I say YouTube has really helpful stuff on there ..