My dear Bev - I am 68 years young - I refuse to let a little old lady in side my body and I think you are much the same!!
I did a blog on your 'mistake' #1 brand and I agree whole heartedly. I had nothing but trouble with it and I have a ton of it as well. I have not given up on using it. I think I can do some things with it but never plan to use it for a 'discovery sew' aka sew out. It is consistently inconsistent. I might use it for mending or playing around with other issues.
Incidently, when I offered others to email me for the name of the brand (I did not name it in the blog), I was surprised that several of them had the same belief. You are not alone.
There are several sites that sell color bobbins but I found that they never really matched or seemed to come close to my needs. I don't really have an answer for you except to try to find #60 weight thread to meet your needs and wind your own bobbins. Please understand that prewound bobbins are the best but if you insist on your own color, it is what you will need.
If you are using light colors like yellow, pink and other pastels, you may find the white bobbin thread is really adequate. Medium dark blue works for many of the dark colors as well.
This site is the best on the Internet for information. It is organized with Forum questions and Blog information that will keep you informed and very busy. Tips and tricks are plentiful on the Net but be sure you are using a trusted source. Emblibrary is a good place too. Not every tip/trick will work for every embroiderer. That are variables every step of the way. Using the tips, discovery sew and your own common sense works 99% of the time.
I did this Forum Tutorial and it works for about any machine, it is the information that is the star. Newbies and experienced embroiderers can always learn (ME INCLUDED) or get a tip we have forgotten.
Pat, The Avid Embroiderer