Hi Carmen, meandering requires a lot of practice. Don't get frustrated or give up because it didn't work this time. Try a little more on scraps before you give it another shot on a quilt. And to tell you the truth, even when you achieve a point where you feel you control it, you will still hit a day when no matter what it doesn't work. Just practice on fabrics and batting similar to your quilt and keep going. I teach free motion quilting, have made tons of quilts and sold many of them. I can say I have no problem with it...well, almost no problem. Today I was quilting and my machine sneezed and all of a sudden no matter what I do the bottom threads start showing on the top a lot. One second before it wasn't and now it does. I re-threaded the machine, changed the bobbin, even changed the needle. Had to turn off the machine and walk away. Came back a few hours later and it works fine.
Be prepared to practice a lot and to every once in a while it may not be perfect. Good luck.