Investing in Spain

I'm feeling a bit overwhelmed trying to figure out the best setup for investing and saving while living in Spain, so I'd really appreciate some advice from people who've been through this. I'm 39 and currently have about 15 000 € in savings spread across three different bank accounts. I've realized that leaving it sitting there is probably costing me money because it's earning little or no interest. I also have just under 1000 € invested in the Vanguard FTSE All-World UCITS ETF USD Acc on DEGIRO