If you are talking about the slot to add a Bitcoin wallet address that's available on this forum user profile. It's not a must you add your wallet address and adding an address on your profile does not violate the forum rules but using a self-custodial wallet is always the best for crypto holding.
Firstly, mobile wallet are prone to attack but if you must use a mobile Bitcoin wallet, Electrum wallet is still the best for newbies. For the tax (I believe you mean transaction fee) is base on the congestion level of the BTC network.
Im willing to use a mobile wallet because my computer got hacked once and all my passwords had been exploited. Im afraid it happens again. Thanks for explaining the fee. Thats exactly what i meant.
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I'm sorry about that but the next thing shouldn't be going to a wallet that's more vulnerable to attack than the desktop wallet.
About the hack that happened to you, are you able to find out how it happened so you won't make the same mistake again.
According to what you said I will advise you to go for a hardware wallet instead of a mobile and desktop wallet and never use the same operating system you use for crypto activity to visit untrusted websites or links and don't use free things, especially anti-virus.