You are welcome.
Ah.
Downward Facing Dog. (In Sanskrit: adho mukha shvanasana. Sometimes also simply called "downward dog" or even "down dog" for short.) Probably the most ubiquitous pose in yoga. To an advanced yogi, downward facing dog is considered a
resting pose. (Cue laughter from every beginning yoga practitioner ever.) It's a great pose once you learn to love it. But for a beginning yogi it can definitely feel awkward, and that journey towards loving the pose can be a long one.
The drawing shows the idealized form of downward facing dog. Down dog almost never looks like that in beginner yogis because such a form requires a high level of flexibility in one's shoulders, hips, hamstrings, and calves which most adult humans--unless they practice downward facing dog regularly--do not have.
A good place to start is in
plank pose as this will position your hands and feet roughly the correct distance apart. From plank pose you push back strongly through your arms while simultaneously lifting your hips upward. Imagine you are a marionette with a string attached to your tailbone, and the puppeteer is pulling that string up, up, up! This is the primary action of downward facing dog.
If you feel as if your hands and feet are too far apart at this point, it is fine to walk the feet in a little closer. However, getting your heels to touch the ground is not important. (Once you have beautiful form in the rest of the pose, you can start to work on grounding your heels if you like. But heels on the ground is honestly the least important aspect of the pose. It requires a lot of ankle mobility and calf flexibility which most adult humans will never achieve. Struggling to ground your heels without that mobility will compromise the important alignments in the pose. It's just not worth it.)
It is fine to do downward facing dog with a bend in your knees if you need it. Eventually--once you've developed more back body flexibility--you can work towards straightening your legs. But this is secondary to finding length through your spine and side body.
Draw your navel in and use your core muscles to lift your hips up and back. Press strongly through your arms to move your chest down and back. (Your chest is moving generally in a direction towards your feet.) Lift your heels as high as you need to, and, if necessary, bend your knees as much as you need to, to achieve that long, straight alignment from wrists to tailbone.
Once you have achieved a long line through your upper body, it can feel good to "walk the dog" by alternately straightening one leg, then the other, peddling your heels towards the ground. Just don't compromise your upper body alignment to do this.
If you try all of this, and you're still saying, "Sorry, Laura. I feel like a hunchback in down dog!" I suggest starting with a modified down dog which utilizes a chair (or other prop) to elevate your hands. Pose #6 in the workout below is downward facing dog with elevated hands!
You can also try placing your hands on the seat of the chair, the edge of a table or coffee table, stacks of books, yoga blocks--experiment with props of different heights to see which gives you the best ability to really lengthen through your arms, back, and sides, (and then, eventually, through the backs of your legs as well).
I hope some of this helps!