User2288 I understand that having a wallet on a pc is simply not a good idea because i don't know how to secure it enough
Yes that is my understanding as well. A software wallet on a device that is connected to the internet at all times has too many attack vectors in general, which is why I recommend you use it like your real life wallet and only put in as much as you are willing to lose. This is also true for mobile Android wallets, although GOS is in my opinion the most secure system. In Monerujo, your wallet details will be saved in a local password encrypted file, so make sure you have a strong password and don't give away all file access to random apps (storage scopes is your friend). If you need a wallet to access regularly and don't want to get a hardware wallet, GOS is the way to go. If you can do with a wallet that you access once or twice per year, I think a paper wallet would be best (basically use a new GOS user profile, create a new wallet, save your seed securely offline and delete the profile).
User2288 I want to be able to have monero, tether, and bitcoin
Of the officially recommended XMR wallets nothing supports Tether. Bitcoin is supported by Cake Wallet which I have heard many good things about, but my only experience is with Monerujo. You will likely have to use multiple apps for what you are trying to achieve.
User2288 What if i want to have mutiple monero accounts?
You probably mean different wallet addresses (there are no "monero accounts"), with Monerujo and most wallet generators you can simply generate as many as you wish.
User2288 I am in canada and starting in september canada is gonna tax all crypto purchases which is outrageous and unacceptable to me.
I'm not a tax advisor, don't do anything illegal. You have to decide what to do about this yourself.
User2288 Anyway i just dont know where to buy abd how to do it to minimize kyc
I personally avoid KYC the whole way. Even with the privacy features XMR offers once you exchanged to it, the first point of buying crypto with fiat money is often KYC and raises attention. You chan check out these services and see what's best for you. I only use localmonero, and since it is Tor available I don't see why it wouldn't be available in Canada. You need an account but all they ask for is email, so give them a throwaway address without identifiers. It's a P2P service and pretty straightforward. They have a rating system for users and they hold the funds of the sellers to guarantee you receiving the XMR once the payment has been confirmed. Payment options are plenty, but many leave a trail. Some sellers ask for KYC, but you can avoid those easily. There are many manuals and videos explaining it, best is you test it out with a small amount to get a good feeling for it. And don't worry, sometimes you have to wait a day for the other person to answer. For me so far it always worked.
User2288 The last step is if i have some monero sitting in my wallet and i want to actually cash it out, how do I?
You can pay for many things online, not just VPNs or other privacy related services. For example you could buy Amazon gift cards and use them for your everyday needs. Coinsbee is currently a store I did successfully buy gift cards from, but there are plenty others. If you want to cash out, you can use localmonero as well (just as a seller instead of a buyer). Another way could be exchanging to BTC and use a local Bitcoin ATM if you have those in your location. And who knows what the future holds, so far the opportunities to use crypto currencies are only growing in numbers.
I hope these answers help you get started. I recommend you start small and allow yourself to make some mistakes as it is super difficult to prepare perfectly, but very easy to start with well informed decisions and learn by experience. As I mentioned in the OP, getting Monerujo and a localmonero account will serve as a good starting point for XMR. Once you are more comfortable and paid for your first service (e.g. a month of Mullvad or IVPN, a data eSIM from silent.link or a nice donation to the GOS team), you'll get to your desired crypto lifestyle in no time.
Don't hesitate to ask more questions, but also please make some first experiences as many uncertainties will quickly be solved by trying out any of the reputable or officially recommended services. It looks like you have a September tax deadline to meet, so better get going. ;)