welcome to the board!
You say your an intermediate sewer... ah but grasshopper... quilting is different. Quilters sew with 1/4" seam, sewers 1/2" or 5/8". Quilter use smaller pieces, the smaller the piece the MORE accurate you need to be with that 1/4" seam.
Also I see you have minkie fabric with you cottons. Minkie stretches more than cotton.
I can understand why you want to use the serger, minkie ravels. BUT if you have to un-sew, it is a pain in the A$$.
good luck