€5,350 invested at 18, where to next?

as the title says - I have 5,130 in an S&P 500 index fund, and another 200 or so between BTC and XRP. What would be your advice to me going forward?

for context, I am not going to college at this stage and have been working as an electrical apprentice since around the middle of October which is how I have been able to reah €5,000+ and while I know that it seems like an insignificant number, my family are far from being well-off and hardly have 2 penneys in their savings accounts, so this bit of money could go a long way.

should I instead put it in a savings account, continue investing it in the s&p, or use it for some other purpose? And yes, I know how to drive, and have a small car so dont tell me about it.