IMHO you should go on with hand quilting - but it's your quilt, you can of course do what YOU want and you can decide how you like.
For me SID is much harder than quilting on fabric without seams at all. I'm sure you will see the difference when you start to do the floral motifs. Near the seams your material is quite tight and it's heavier to quilt through - and it's much more difficult to make the stitches on the back look nearly the same like on the front of your quilt. Try to do single stitches - maybe it is easier for you - and keep the quilt loose in your hoop or frame. I'm sure you will improve.
I also don't care too much about the stitches on the back. It's okay for me when the very most of them show up and they are on one straight line. But I also know that this is easier to reach on a wholecloth than on a patchwork quilt!