That's cool tho, I'm proud of you going back to it, not giving up. It is difficult at first to learn, but fun once you get the hang of it. I think I've watched every tutorial video there is, but I still struggle sometimes to get stuff to work right. But gotta keep trying dif things, and eventually you will get it right.
And those verbs existed long before the 70s, check Google ngram. No they aren't slang.