I feel like I need a detox from life. I'm ready to go as far as possible, but I don't want to be alone.

Despite the fact that I don't have serious problems such as addictions, and my mental state is also generally fine, sometimes I also really want to distance myself from everyone, to be alone with myself

Have you researched or consulted about treatment programs? Each treatment program has its own benefits and challenges, you should read information comparing inpatient and outpatient rehab, you can start at a residential treatment center. For example, these rehab programs are best suited for patients with mild to moderate substance dependence.