Congrats I think you both look lovely! :) It makes me so happy when I see riders holding there reins correctly and not like puppy paws or piano hands! Kudos to you on that. I think you leg position look nice and solid, no need to turn your toes out any further than that. They are almost 'too turned out' It may just be the angles but you do look tipped forward, just remind yourself when your riding to keep a straight line from your ear to hip to heel.
In the second picture you look funky because your twisting your upper body and your inside shoulder has come forward. Maybe you were over compensating for losing your balance? Check to make sure your stirrups feel even. Personally I have to have my right stirrup a half a hole shorter for me to feel and be even.
With your concerns about your arms/the bend in your elbow, try lengthening you reins a notch or two so you can bring your upper body back with out pulling in your horses mouth and getting the bend in your elbow, yet still keeping the contact.
Well there is my 3 cents....
Keep up the good work you look like you have a bright future :)
~If horseback riding was easy they would call it football.~