OP I love Brian Kelly, The Points Guy. He is gay gay gay --- out out out --- and smart as fuck. Everything I know about credit cards, I learned from his site.
I have learned to let the credit card match your lifestyle (in terms of your spending habits and plans, not your attitude).
I have also learned to really charge everything because there is no reason not to. I used to be the person who reached into my Birkin to pull out some loose bill for a small Rite Aid purchase: no more. All of that adds up and I want points instead.
I have also learned that credit cards are a moving target, they are warring with each other over capturing consumers so it is best to stay aware of changes and offers. I have four credit cards. They all have various temporary, smaller offers but as far as Points:
1-I have an Amazon branded Visa is for all things Amazon only, including streaming. You get extra points for Amazon purchase that turn into extra amazon dollars. Sometimes I let them accumulate and just have them pay for my Amazon purchases for a few months. No fee card.
2-I have a Chase business card solely for eligible business expenses (everything from Staples to a printer I work with). No fee.
3-I have another Chase card which I use for almost everything - it has a great travel points program, which is the reason you do it. They give extra points for your travel expenses (which to them includes Uber and Lyft.) They always have an intro of anywhere from 60,000 to 100,000 point upon joining. 50,000 points is worth about $750 in travel. I have had a huge number of points accumulate since Covid. I'm holding out for a big ass vacation. At this point my points could pay for two first class tickets to Hawaii and most of a 5-star hotel. It has fees, which if you charge a lot is insignificant because of the points you get.
4-I recently received a great offer from Amex Platinum. Tons of points up front and 10x points for 6 months on grocery and gas. This is pretty epic and I have now moved my gas and grocery purchases from #3 above to this. There is a fee.
I have learned a shit-ton about this stuff in the last few years, was completely disinterested before. I have also "trained" lol my husband to do the same with his additional cards (particularly #3 and #4). This stuff works best if you are disciplined about it.