These so called cookie layers are not necessary for tracking. They are not even necessary for first party on site advertising. For that you also do not need consent if you read the GDPR/DSGVO (German version).
In the DSGVO it is §6.1f [1] you would want to read about. There is even an elaborate explanation from the German legistlation [2] what "Berechtiges Interesse" ( legitimate interest) exactly means.
So to make this short: direct marketing as well as tracking is totally fine even without consent. Give an option to opt out, explain why you need the data, what you do with it and how long you store it as well as a point of contact (for people wishing for their data to be deleted) and you are fine.
As long as you do not do profiling or stuff like that. A personal blog/website is then totally fine with GDPR. Btw. you would need to add all of this to your privacy page even if you had no web tracking installed, as your webserver probably would have logging activated. Having an IP address in there make this data fall under the GDPR (at least in Germany). So you would need to explain all that stuff because of the log files non the less.
[0]: https://schriftrolle.de/datenschutz [1]: https://dsgvo-gesetz.de/art-6-dsgvo/ [2]: https://dsgvo-gesetz.de/erwaegungsgruende/nr-47/
[Edit:] Ordered the footnotes
Second, are you sure about this? My understanding is that if you use third-party tags such as analytics you need to get consent from users and not to use them if they don't consent.
One other thing that is not clear to me is if we need cookie prompts, and how can we implement cookie opt-ins/outs without being able to set cookies.
If you do linking of such stuff (like Google Analytics with DoubleClick) you need an opt-in. Only then the opt in cookie banner is really necessary.
Please excuse the late answer - was on holiday.