With Bitcoin directly? You'll be quite limited (though not impossible). If you are looking for non-KYC off-ramps, there are many; especially if you are living in a country where cash is widely accepted. P2P Bitcoin trading is quite widespread, though it requires some due diligence to find reasonable and trustworthy people to exchange with.

For most of your online purchases, you can go with a gift-card; though it's an annoyance compared to just having one single card with rewards and cashback.