I'm a designer who codes in this way. I can mock out a bells and whistles prototype that appears to work splendidly enough to test with users, but in reality I'

I'm a designer who codes in this way. I can mock out a bells and whistles prototype that appears to work splendidly enough to test with users, but in reality I'm just hooking together libraries and pasted code. I have been doing this for 10 years, enough debugging savvy to "learn" React in 2 weeks but do I actually know how any of it works on a deeper level? Heck no.