Do this especially since you're probably not gonna be able to avoid using at least a couple resource-hog Electron apps, so you need to save your battery for them.
Also: Apple's first-party "apps" in general are pretty great. Preview is a religious experience. Terminal.app is one of the best GUI terminal emulators on any platform. Give them a shot if you're not used to bundled software being much good.
With the ability to have multiple tables next to and around Keynote styled diagrams and notes on a single, giant zoomable sheet-canvas with all the usual spreadsheet functionality, Numbers quickly replaced my personal Excel usage.
Notes is nice. I wish it had a 1st-party export solution. Markdown as an option for formatting would be good but it's not a deal-breaker. Being able to drag all kinds of crap, including entire PDFs(!) into Notes and have it Just Work is pretty great.
Preview is so, so good. Thanks to it, macOS is the only platform I've ever used where I don't hesitate even a second to open a PDF. Plus it's great at so many other things.