I have a low end Brother too. The tips above have to be followed because these machines will move all over on you. Even with my hanging on and guiding the fabric, I still could not sew a good quarter inch seam until I bought this foot. WalMart used to sell them.
https://www.amazon.com/Brother-Pieci...5229579&sr=8-2
I, also, have this one with the vertical part on the edge. I found it got stuck on the seams when I tried to sew blocks together.
https://www.amazon.com/Quilting-Patc...5229579&sr=8-3