Sewing machine issues

I am now using my straight stitch machine because my Viking decided to have bobbin tension issues.  I have tried everything to fix the issues and to no avail.  So tomorrow it is going to where I purchased the machine so that I can get it fixed.  Skipping stitches and looping was driving me nuts.  So I am done as far as that is concerned.  So my Brother straight stitch is doing all of my projects.  No fancy stitches here.  And found out that the mug rug that I made would not have worked for my partner.  So I am back to the drawing board with that one.  I am going to add some lace to hers and hope that she likes it.  I am such a horrible beginner sewer it isn't even funny.  Hopefully I will improve.