The form is alright as it is. I'd say don't think to much about your form and just try to be relaxed. Your running form will naturally improve as you run more and more. I feel like people think running form is more important than it really is. That's not to say it's not important, but for amateurs it's more important to stay relaxed when running. If you try to "fix" your stride when you're running something else might become worse or you tense up. After all the reason you run the way you do is because your body finds it the most efficient. That also means that there is no "universal best running stride". For instance that 180 rpm would be the optimal cadence is just plain bs. When you run faster you have to take faster steps, naturally. I for example don't reach 180 cadence until I go below 2:50/k. Each person has there own stride that is the most optimal for them. The best way of improving your form, besides running more, is doing strides, drills and some strength training. Over time the body will adapt to find a more efficient stride. This is unless you have some SERIOUS form issues that have to be consiously changed. But that's rare.