Just started investing

Hi all, I’m 21 and am just getting into investing. I’ve been doing some research and have came up with a long term strategy. I can easily spare £500 a month at the moment to invest. My portfolio would be all long term investments 10-15years

The portfolio split I have in mind would be: 30% vanguard s&p500 25% nasdaq 25% vanguard ftse all world 10% us small cap value 10%emerging markets

Does this seem like a good strategy? Any tips or changes anyone would make would be appreciated. Thank you