Uh-uh.
Catrin, I'm glad you and your bike are okay. This sort of fall rarely results in much injury. But your helmet is not fine. Helmets are meant to take one impact. Many people won't replace a helmet if it just falls to the ground without your head in it - but this is a subject of debate. If it falls to the ground with your head in it, no matter how low the speed, there is no debate, although it may take an X-ray of the EPS to show the damage. If it falls to the ground with your head in it and sustains such a hard impact that you have a headache, you have actual physical evidence that it's done. Replace it. Before you get on your bike again.
It's money out of your budget and times are tight, I know, but if you've ever known anyone with traumatic brain injury, you do not want to be that person.
Once you've replaced your helmet and start practicing again, pay attention to the countersteering/leaning thing. That's what I see is missing from your "plan." If you want to put your left foot down, slow, unclip left, turn your bars slightly to the right to initiate a left lean, then put your foot down.
Good luck and continue to enjoy. These falls do happen to almost everyone, and I admire your persistence!