If you want privacy you should be using Monero. If you use Monero you can use the official wallet together with Trezor. In fact, if I am not mistaken you have to, because from what I recall the Trezor Suite has no support for Monero.

You can have the best wallet in the world and not be private because you've not been using a private cryptocurrency. There's no amount of wallet privacy features that hides the fact that a certain address holds a certain amount or that a certain transaction has been taken place on a certain point in time.
The only cryptocurrency (that I know of) that has reliably granted these guarantees is Monero, so I'd recommend to use that if what you desire is utmost privacy. However, Monero isn't known to be a good investment, it's a good currency (as far as I am concerned), so you might not want to hold significant amounts of money in form of Monero.

That being said, you usually only require the wallet vendor software to install apps on and update the firmware of a hardware wallet. After that you can use your hardware wallet with a compatible software of your choosing.

You can also use a paper wallet of some kind (I think there are even some metal ones, but I don't know how you etch your seed words into them or how else they might work). You'd usually want to use some form of encryption on those though and then you got to store a secure key somewhere or rely on your brain to memorize an insecure one. Both aren't really superior to just using a encrypted wallet file on one or more storage medias. Technically you could even apply something like Shamir's Secret Sharing to make a M-out-of-N backup (basically multisig, but applyable to all kinds of things).

Personally I don't think there's a perfect solution here. You have to die one death or another.

how to access crypto easily while at the same keep it private and safe?

These are conflicting requirements, true for all valuables: more accessible is less safe, more secure is harder to access. The solution is to split up your money in levels.

• Some hot crypto on your phone, like cash in your wallet. I keep about $100 of monero on my phone, ready to spend if I meet an accepting merchant.

• Similarly, leave some hot crypto on the exchange if you trade regularly.

• Some warm crypto on your pc, locked, secured, protected by dog and gun. This is like your checking account, ready to send to an exchange if fiat is needed on a rainy day.

• Everything else in air-gapped cold storage. Bury the seed phrases and tell no one. This is your "savings account", the stuff you will hodl and pass on to your kin, with no plans to ever sell.

Since by design cryptocurrencies aren’t backed by banks/nations and any transaction is permanent, they are by definition not safe.

At best, you can save out your wallet to an encrypted drive, then write it back to your phone when you need to use it. Make copies, so if one gets lost, you don’t lose the value itself.

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