What should I focus on in my first year of FIRE?

Your first FIRE year is about validating assumptions and protecting against early shocks, not locking everything in stone. Track your actual spending against your planned budget, because real numbers almost always differ from estimates and the gap tells you whether your withdrawal rate holds. Get your health insurance solidly in place — usually an ACA marketplace plan with MAGI managed for subsidies — and confirm your cash buffer is funded so a market dip doesn't force stock sales. Start your tax machinery: first Roth conversion, any tax-gain harvesting, and quarterly estimated taxes if needed. Resist big irreversible moves like an expensive relocation or a costly hobby until you've felt out the new rhythm. Emotionally, expect an adjustment period as your identity shifts from earner to retiree. Treat year one as a shakedown cruise. Reconcile your real budget against plan at wealthserene.com/tools/budget-analyzer.