If you are having loops it could be one of two things. Either you do not have the bobbin winding the right way, or the tension is bad off. Take your machine of your frame if you can do so, if not then lodge it so it will not move and try sending some fabric through it. Make only slight small turns on your adjustments and try again. Also remember, each day you sew you need to apply a drop of oil in the bobbin area speciafied in your manual. One more thing, make sure that your machine is clean and free of lint and small pieces of old thread, this too can cause a machie to not sew properly.
I wish the best of luck getting it all going ok. I am off to work on a custume now.