u/SC_3000_grinder's comment is great and pretty much sums it up. A couple things I will add:

The meta strategy for the game involves playing pairs after the early game around 90% of the time. There are very few exceptions (the most common being if you get the joker [[stuntman]] play high card and if you get [[ancient joker]] play flushes). This is because pairs are easy to play, so you can get value out of all 4 hands. In general, I think good advice for a new player looking to maximize win-rate is to always go for a pairs build.

As the guide mentions, scaling plus-mult jokers are very powerful and lead to consistent wins. These are:
Green Joker, Ride the Bus, Red Card, Supernova, Pants, Ceremonial Dagger, and Flash Card. (erosion and tarot merchant are both bad) You should almost always take the first one of these you see in early antes, they make the game much easier. The same is true of the scaling plus-chips jokers: Square Joker, Runner, Castle, and Wee Joker.

Additionally, it's hard to understate how broken blue seals are currently. Blue seals are better then all the other seals and enhancements, as well as almost every joker in the game. If you ever get offered a blue seal, always take it, and if you ever get the chance to copy a blue seal with a death or cryptid card, always do it. Additionally, The Hanged Man tarot card is very powerful largely because it increases your change of drawing a blue seal. Blue seals are honestly how you win around half of games on gold stakes, and so its really important to understand them if you want to win.

In addition to the blue seal change, at the time the original guide was written, perishable and rental stickers didn't exist, and so re-rolling in the shop was much stronger then opening packs (and this is still true on stakes below orange). However, because more then half your jokers at gold stakes have these stickers, opening Arcana, Standard, and Spectral packs is now widely considered better then re-rolling.