I don't know of any courses, but I've always thought that there was probably a big psychological barrier for many people who aren't good with math. I know some people have more of an aptitude for it than others, but thinking "I can't do math" -- or hearing your parents say it when you start bringing home poor grades in it -- can't possibly make things easier.
FWIW, the math lightbulb went on in my head one night when I was doing geometry homework in 9th grade. It just took lots of practice, doing the same kinds of problems over and over until the patterns started to make sense intuitively. And just working with numbers a lot made things fall into place. I did struggle with calculus and statistics in later high school and college, but a lot of that was because I didn't fully understand the basic concepts before we moved onto more complex things, so I got lost quickly.
I took 2 semesters of statistics in college, so I was pretty good at it by the time I had to take another semester of it in grad school. Many of my classmates in grad school had been English majors who kept saying "I just can't do math." And the teacher went too fast for them -- he really did not explain things well. So we formed a study group to go over the homework assignments very slowly, to give everyone a chance to ask questions and understand things at a slower pace. I told them at the beginning that they had to stop saying that they couldn't do math -- just forget that and focus on the task at hand. We just all worked together and everyone made it through the class. And then they bought me beer after finals... 
Another thing -- my most excellent high school algebra teacher, Mr. Foerster, taught us something that has been very helpful to me. He told us there is nothing worse than a blank page. Get your feeling of confidence by writing down what you know, so the page won't be blank anymore. Write your name. Write "Question 1." If it's a word problem that says "Moe, Joe and Zoey are going camping in Glacier National Park, and Moe bought 6 cans of Spam for $0.50 each," then write "x=6" and "y=0.50." If you'll be setting up an equation in the form of "a/b = x/y" write the lines and the equal sign. When the page is no longer blank, it helps your brain start thinking.
(Most of Mr. Foerster's word problems involved Moe, Joe and Zoey going camping in Glacier National Park with many cans of Spam. If he ever became ruler of the world, he planned to make Glacier National Park the capital. I can't remember what I did at work yesterday, but I will never forget that.)
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles