If any one but you has access to your btc do not store your bitcoin on there. Someone else could get a virus or malware without you knowing and they could install a keylogger or something that can capture your keystrokes or screen and get into your wallet. I would only have a hot wallet on a computer that only I have access to other wise you could get your btc stolen because of someone else without you knowing. Kids always download weird stuff that could have viruses embedded into it.
I have an older PC, which I said I don't trust, and the reason I use this system is for browsing and online gaming, during which I might have visited sites that might be suspicious. My brother and a few others also have access to it, which is the major reason why I need a new one that is specifically for my wallet and personal use alone.
You can also use an older Android phone that has the Airgap Wallet installed on it; that app is designed to use the secure chip of your phone to store the secret data inside.
I said older Android phone and not iOS because now you need iOS 13 to run Airgap wallet, which is not something that most older iphones have.
I have an android phone like what version of android do you consider old, let me give it a try because I really prefer using mobile phone over laptop wallet, even after backing up my wallet outside the phone, I always protect my mobile device in every way possible and i don't share it.