Well done Michael
A friend of mine ran his first 4 mile race in a similar time to you and is now down to sub 26 and thinks he can go faster(I think he can as well). The best way to get faster and more into running is by racing. Your splits are excellent too, they are all very similar which shows that you have god strength especially as your last mile was your fastest.
Fair play to you and good luck with the 5 miler, are you going to try and run similar splits for the 5 mile as you ran for the 4 mile ???. I look forward to hearing how you get on.
leeeeeggggiiiiiiiiittttttttt