In my experience, it is a long, slow slog. Sometimes, you can skip a couple updates, but there's no way to know which ones. I've got almost 30.

You just have to hit the update button and see what's offered.

iMac (19,1, 3.1 GHz i5, 12.7.4, 40 Gb RAM); MacBook Air (1.8 Ghz, 8 Gb RAM, 10.14.6, 256 Gb SSD) Vodafone router and Devolo Wi-Fi Extender, Canon TS8351 printer/scanner.