You do not need isolation; you need enough quiet to hear what constant input was covering.

The remedy is not withdrawal from life; it is a reduction in input. Constant sound, feed, and conversation cover over an ongoing internal signal that is quiet by nature. You do not need a retreat to hear it, only some hours where nothing is being poured in.

Try a walk with no headphones, a meal with no screen, a commute in silence. Small amounts, regularly, do more than a rare grand gesture. What surfaces is usually something you already half-knew and had not had the quiet to finish thinking.