A wallet, in the crypto world, is a software or device that allows to store private keys and to use them to send transactions on a blockchain. For Ethereum, Avalanche and CopyrightChain transactions, we recommend the Nano S/X/blue Ledger as a physical wallet, Metamask as a client web3 and mobile wallet.
At NIM we are also using https://gnosis-safe.io/ for multisignature (as with NIM Foundation). A more userfriendly wallet is https://www.venly.io/