Which blockchain has better block speed, lower cost, higher security and better road for scaling up (network running smoothly with more and more dapps being created on it)?
There are very few projects in Solana yet, low liquidity and fraudulent hackers have not yet explored the system.
If you want to experiment, it is better to use Ethereum Level 2 solutions or Binance Smartchain.
But you need to understand that money can be lost in case of errors in smart contracts or due to their hacking. Therefore, you need to be very careful not to contribute large sums to new projects. Smart contracts are written by people and they are not always perfect.