Investing my unused money in Europe (Sweden in particular)

So basically I have some money that just seat still in my account which is such a waste due to inflation so I think why not investing? That said, I know nothing about stocks, bonds, commodities and anything of such. I would study and read books if it actually helps but I know most people cannot “beat the market”. So I’m thinking of just put my money in something low-risk and just leave it there (feed some extra money every month). Of course, if diversifying my portfolio doesn’t cost me time then I’m open. Please give me your advice 😊

I see that lots of people suggest Avanza and Nordnet for that. I haven’t checked them out but are they actually better than just using Revolut? I plan to learn Swedish soon but it’s good to have a platform that’s in English. Thank you 🙏

ps: I’m a non-Swedish from Asia