Being blunt: your setup doesnt protect you from Apple. Websites will and does recognize you on every visit, both those done in private tabs and the usual ones. DDG and ProtonMail i cant comment on, but they are one of the better choices for the less tech-savvy/i-want-to-spend-my-free-time-having-fun. You have a pretty nice setup in terms of security, however.

If you want better protection for websites identifying you, you should consider researching on browser fingerprinting (which is extremely hard, if not impossible to do on Safari). If you want better protection overall, ditch Apple.