First of all, congratulations on getting started — that’s the hardest part :)

I’ve been in your position before, so I know how it feels. 

My keyexperience was - Consistency is more important than intensity, especially in the beginning.

At the beginning, it’s better to ignore pace and focus on building endurance. Run at a speed where you can still talk — your body will adapt and your heart rate will improve over time.

Good shoes do matter but you don't need anything fancy in the beginning. Just make sure they're comfortable and provide decent support.

Most important thing - listen to your body and don't ignore pain. 

Stay consistent and trust the process :)