Any runners out there?

A

Any runners on here if so I have a few questions.

1.) How can I breathe better while running as of now I sound like a dog lol I've tried the in through your nose out though your mouth but it seems I get tired faster trying to do that

2.) I can run a mile but it takes me forever and I'm trying to improve my time when I do try to speed up my run I feel like death after and get a terrible headache? Any tips on improving speed?

3.) What are some things that really helped you become a better runner?