Is it better to build my own portfolio or use a portfolio builder tool?

Both can work; the question is how much you want to manage. Building your own gives you full control over asset location, fund choice, and your exact stock/bond split — ideal if you enjoy the details and want to optimize across accounts. A guided portfolio builder shortcuts the design by turning your goal, timeline, and risk profile into a concrete target allocation and fund mix, which removes analysis paralysis for people who'd otherwise never start. Either way, the principles are the same: keep costs low with index funds, diversify broadly across U.S. stocks, international, and bonds, and commit to a rebalancing rule. The worst outcome is doing nothing because the choice feels overwhelming. If you're stuck, start with a recommended allocation at wealthserene.com/tools/portfolio-builder, then adjust as you learn — you can always refine a simple, low-cost portfolio later.