https://edge.app
Edge Wallet

Not sure about the lowest fees but I’ve used coinbase (based in the UK) and it is secure and easy to set up. Accepts credit cards, bank transfers

i dont know what the best way is, but the easiest is coinbase, and if you need privacy you could use a mixer service. I have used EludeMail (it's a free e-mail provider on the Tor network, also has bitcoin mixer and monero exchange), did not have any problems.

I am a lazy person, so I just purchase via coinbase

I've only used Binance so far, but I understand there's a ton of other exchanges out there.

coinbase pro fees are so low

Frankly i don't know. I am kinda new to all of this stuff, so....maybe i could use some of advices, placed here. And by the way if the problem for many people here in buying bitcoin than my problem will be in selling it. What i do know is monitor many exchanges in order to find good and reliable one. With the help of instruments https://arbitragescanner.io/exchanges-review/ it is quite possible to find reliable exchange for sure, but we will see how the situation with my bitcoins will resolve in future