You can check potential coins on several exchanges, nowadays there are a lot of coins appearing, but rarely get such a big place and potential as ethereum, personally I like BNB, Matic and Solana, but since the last few months the market has not been in good shape, made all three of them experienced a correction, so it is difficult to see great potential for them under these conditions.

If you have the opportunity to buy bitcoin, then this is the right step, because of the many coins that exist, only bitcoin money has good utility.