Please, Atomic wallet is working fine?
if its working fine for what?
I would recommend using a “real” cardano wallet like daedalus, eternl or gerowallet. Dont forget: Not your keys, not your coins! Atomic Wallet seems fine, but for staking for example you are staking with their platform, which means you wont be able to choose your own staking pool.
Overall I would recommend using a cardano wallet.
as reference, check: How do I stake ADA? - Atomic Wallet Knowledge Base
By staking your ADA in Atomic Wallet, you’re choosing us as your validator (aka staking pool).