Any advice from the community on what environment is best for SICP/Scheme? I'm currently using Dr.Racket as I've heard to avoid Emacs at this point, any other suggestions/thoughts?
Allow me to recommend you a piece of advice rarely followed by others - practice the act of selling every day. That helps enormously to get good at sales (and better than any book).
"At Gumroad, we’ll stop just shy of letting you charge tenths of cents (come on, gas stations, that’s cheating) or allowing the font on your change to be smaller on-screen."