ETF Portfolio

Hi! I am really now into investing, I have been saving on a growth account but now I realize that I maybe should invest those into ETF.

I am based in Finland and I have researched a bit on type of ETF, etc. I am thinking now to diversify my investment into SXR8, LYP6, and IS3N. Would you give me your opinion on it?

If that would be not a good idea, should I just invest it in world ETF? If yes, which one?

I have some limitations on which ETF I could buy since I want to do it with the monthly savings program with Nordnet.

Thanks for any advice!