Host your minified font pack on your local server. It reduces load times and obviates the need for extra cookies (or any at all!). egads! How many fonts are you using on your website anyway?
Set up an LLC or LTD or whatever your local region version is. If you’re selling much of anything, you shouldn’t be selling stuff on your own without legal protections. If you’re just selling a few little things, you shouldn’t be selling from your house, but via a PO Box. It’s just unwise and a tax complication besides. (Perhaps Germany is more friendly wrt this, IDK). Otherwise, there are indie selling marketplaces which side-step such issues.
These are all set up to protect the consumer, and are very good things.
Ok. I understand your concern. What options does Germany have for setting up, for example, a separate address for business purposes, such as a post office box? How about creating a LLC or LTD (limited liability corporation, DBA/doing business as, or something similar)?