I am new to using my walking foot also, and one thing I have already learned is that for my machine, it doesn't like to go at full speed. Also, I've learned that I have to take care to only lightly guide the fabric and not to pull or push it. When I leave it alone and let it do it's own thing at about 75 - 80% of full speed, it works great and makes a nice even stitch.
Welcome to the board huggggggs and smilessss, we are happy to have you with us!!