You are way too hard on yourself. I know you are working on your self-esteem n'such....but I see self-deprecation working it's way in too much on here, if it shows here....it's likely to show at home too You really IMPO need to work on validating and affirming yourself just as you would your W. You are doing some tough work on yourself and your M, give yourself some credit here...you deserve it.
You cannot expect that just because you now have the info and some of the tools to improve your M that you are going to be able to take that ball of information and score a touchdown right off the bat. There are going to be fumbles...that's part of the learning process for you. What you did the other night with your W, that was practice....keep practicing, you'll get the hang of it! But absolutely stop slapping yourself around for the fumbles. Recognize the fumble for what it is....a learning opportunity.