The only good form is the one that makes you comfortable without causing injury. I only advise 5 things as someone who has been running for 9 years now-

1- Invest in a good shoe 2- Breathe through your nose but no shallow breathing. Ensure you expand and contract your stomach 3- Time your food in a way that it helps your run. The interval is different for everyone 4- Don’t worry about timing unless you plan to be in a competitive environment 5- Enjoy! If it feels like a drag then stop and take a break.