I'm new to investing and have an understanding of the basics and what I want my portfolio to look like. I'm in no rush and will be moving slow - I want to get this right. Due to personal/professional factors, my contributions to my investments will drop significantly in ~5 years and I'm likely in the highest earning period of my life now. I plan to invest heavily over the next 5 years while I have the means to do so with the goal of maximizing how much my money compounds once my contributions slow down.
I'll be investing squarely in globally-diversified ETFs but have not decided on what % of my investments will be stocks or bonds. My understanding is that balancing a long-term ETF portfolio with 20-40% bonds reduces volatility. Should I go high risk/yield (less bonds) for 5 years while contributing heavily then balance my portfolio later, or keep things simple and safe regardless of my projected contributions?
I'm aware that savvy investment strategies (especially couch-potato methods) look 20 years forward and not 5, but being in the highest earning period of my life now in my early 30s with an expected drop in my late 30s, I'd love some feedback.