Learn how to use the 2 setup software:

1st device holds the private keys and never connects to the internet,
2nd device broadcasts the raw transaction created on the 1st device

This is the foundation of good security when dealing with Bitcoin. Also never use any device that has been created to be used with crypto, even if they are Bitcoin-only, because they make you stand out. You want a generic laptop, a generic USB, things that don't say you hold any coins. And stop dealing in altcoins, they are fundamentally not safe, stick to BTC and that's it.