I have to say, I use DDG regularly for search and switched about a month ago. Honestly, I have had little issue with it besides the occasional switch to Google when searching for super random very niche things.

The real trick, is to just start using it and force yourself to. It's really not too bad, and there is always startpage, which you can use as backup.

For reference, I use Firefox on mobile and desktop and when I type in a search I can select which search engine to use. By default I have DDG, and with one click I can get startpage or Google.