This class has removed all of this fear and stress for me. Lisa Lam teaches 20 Essential Techniques for Better Bags on Craftsy.com and I have to say it is excellent!
It is not a class where you make one specific bag, rather it's a class where she shows you how to properly insert straps, handles, d rings, closures, interfacing, structure, zippers, pockets, grommets and more. Lisa explains her methods very clearly and in plain language so that students understand what it is she is doing.
What's really great about Craftsy.com is that after you have paid for the class, you have a teacher available to you 24/7 and you can watch you video whenever you need to. So the second time, I made a bag recently, I went back to the video again. I will attest that it is the best money I have every spent on a bag class and it is paying for itself over and over again, every time I watch it. My second bag looks even more professional. I'm loving it!
Also, if the regular price for this class is not affordable for you Craftsy is having a **HUGE SALE** Black Friday - Cyber Monday ---> ALL online classes & craft supplies! This sale will run from November 26-30th. So enrol then to learn and make a more professional bag!