You're doing great. If you're looking for some reading material, look into 3-fund portfolios if you're not already familiar with them.

Solid plan. Don't be one of those people that leaves their money sitting uninvested in the ROTH IRA though. Mentioning this because you said you're a true beginner, and I occasionally see posts where the money sat in their account for 5+ years because they didn't know. FZROX is a decent pick to park your money until you have a better picture for what strategy you want to implement. Also, don't panic sell your positions just because they drop. You're not down until you sell at a loss.