Need Asset allocation help after being left 500k

Long story short I’m 18 and now have access to money that was left to me. I want to live my life normally go to college etc… but with this money I have been fascinated by the simplicity behind the Boglehead esque style of investing. I have another 30 grand in stocks that I’ll continue to manage. My 500k is In fidelity so I was planning on using FZROX for US based stocks FXNAX for Bond index funds FTIHX for international fund. But I don’t know how I meant to allocate those assets… like what ratio to use. Also I want to keep 15% in cash. I was thinking 60-40 equities to bond but since I’m young and lack experience I’m not sure if this is too aggressive. Also what’s a typical ratio for a us based index fund to international index fund for that 60 in equities. Also I haven’t had a job before and have no clue how taxes work since I have no current source of income does my asset location matter