I have best success with new needle, medium speed (if you can, set the speed on machine and let it run), feed dogs down, tension at about 7, and moving the fabric slower.....once you get the hang of it, you can speed up the machine and fabric.....tension can be a tricky thing, you will have to play with it a bit.....don't get down on yourself, it isn't easy at all the first few times you try.....put together some practice sandwiches to work on until you at least get the tension better....I despise ripping out, so will always get a practice sandwich before starting a quilt, just to make sure machine is behaving!.....it looks like your stitch length is pretty consistent (something I always struggle with), so that is one aspect you won't have to worry about so much....try to have fun, but practice, practice, practice!