@PierroDi For a beginner who wants to buy only the largest cryptocurrencies (BTC, ETH,LINK, etc.), I can recommend Bison. It's from the Stuttgart exchange, is fully regulated and offers a tax report that you can put with your tax return when you sell cryptocurrencies.
Bison has no savings plan and you just have to submit the tax report with the income tax. Sure about 1% TER but for this in the savings plan and sale incl. auction directly through your broker.