Getting a hand grinder and using good beans is probably the biggest jump in quality you can get. If you’re just drinking one cup a day, a bag of beans for £10 works out to about 60p a cup, and you can honestly make coffee that you’d pay £3 for in a good cafe. As long as you’re weighing and timing.
Edit: didn’t mean to paraphrase @jdp there.
Getting a hand grinder and using good beans is probably the biggest jump in quality you can get. If you’re just drinking one cup a day, a bag of beans for £10 works out to about 60p a cup, and you can honestly make coffee that you’d pay £3 for in a good cafe. As long as you’re weighing and timing.
Edit: didn’t mean to paraphrase @jdp there.