Best all world etf

First time posting here although i have read quite a lot of posts and I enjoying coming here everyday a d read some. I am 25 years old living in Greece and currently i can invest 500-600€ monthly. I started two months ago buying vwce etf. My current strategy is to keep buying that amount of vwce monthly for the next year while continuing to study how the whole investing thing really works. My question is , is this etf the best choice or is there any " cheaper" options that are going to give me more return over the years? I am in for the long run and investing for the next 25-30 years hopefully the same amount( most likely a bit less in the next years since i am planning to move on my own !! What do you think?? Thanks a lot in advance

Edit : thanks for your responses, I really appreciate it !! Wish you all the luck in the world