The hardest part was reading though hundreds of posts to learn before I jumped in, but it was the best thing I ever did. I learned soo much from others mistakes and borrowed already tried concoctions to mix myself.
Plus 1 on waiting for Wizard to ship or get things in stock.
If DIY stresses you out it may not be for you. I approach it as a fun part of vaping, being an evil chemist at play. Unless you follow the recipe of someone else (not my thing), imagination goes a long ways in upping your sucess with DIY. You never know what will work out with what fro you until you try it... taste after all is speculative and individual. I start with small test batches, usually 5ml and have 12 or 15 of them going at the same time (although I have 50 bottles for test batches). And I make notes when they are dripped as they steep, what my impression is along the way, what gear they are the best in, what I might try to improve them if they need it. When one hits so well it can be a ADV for me it gets a 30ml batch. Sometimes putting two test batches together at some percentage also makes them a winner. I have never tossed anything out. The ones that don't hit still get used one way or another, maybe "reworked" or added into something else sililar that will mask whatever I didn't like about them. At present I am working with about 40 flavors/additives, but have several others on the list for the next time I buy them. One of these days I'll maybe get into the fruits more too, only have 3 flavors so far and only one I like (for a tart caramel pear). On the list for today or tomorrow is to make 1 repeat 30ml ADV, 3 30ml ADV's from test batches that scored high and 4 new 5ml test batches I've dreamed up.
I do about the same thing, but some of those test bottles still taste like crap and I do need to trash them. But, I keep think some day I will figure out what there good for.