Solidity (language for Ethereum Smart Contracts) is relatively easy to learn. There's also tons of free resources in learning them (https://cryptozombies.io/). I would say this would be one of the hottest languages of 2022.
Yeah Solidity has many resources and is worth learning. Solana is another smart contract platform which uses Rust, and Rust is a fantastic language, though it is tough.
Both ecosystems use Node.js for scripting/tests/frontend so that is going to be advantage to learn.
