Following a slow progression in a plan is a great way to get started. Try to stick to the plan progression but you can always stretch out the timeline if needed. You can also take a break for a week then start back up with the last week that you completed to be on the safe side.
As for form, there are a lot of different types of runners out there. Sometimes little running asymmetries are meaningful and sometimes they are not. You could have a muscle imbalance as other people have said and that might be worth sorting out, or you could have a slight difference in the anatomical alignment of your skeleton, most likely the angle of the neck of the femur. If that is the case, trying to push yourself to toe-in might be very counter productive.
What I tell new runners is to have fun and don't over think it. Run and try to find joy in being outside and running. If you end up with more injuries and want to continue to run, well then you'll have to have some assessment done to sort it out. Or if you decide you love running and want to train for longer distances, then again you may need to adjust things to prevent injuries as you increase mileage.
But for now, rest until you feel better then just run for the fun of it.
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2007 Look Dura Ace
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2012 Moots YBB 2 x 10 Shimano XTR
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