When you take out the broken needle , pay close attention to which side the flat part goes. Then replace the new one in the same way. Make sure you put it in as far as it will go, and tighten the screw. I use a screwdriver in my large machine because it vibrates a bit and gets loose.
Definitely have a look inside to defuzz your machine. If you can't follow the manual to do this, just take it in to your fav shop and ask them to show you.
Or, get another sewing buddy to show you. Generally quilters are a friendly and sharing bunch!