How can I remain steadfast on the path of guidance and avoid returning to disobedience, especially given the necessity of mingling with people after a period of solitude and worship?

The questioner should appreciate the blessing of guidance after misguidance and show gratitude for it in word and deed. By nature, humans are social and tend to interact with others, so one should choose companions who will help them obey Allah. They will find such companions in mosques, scholarly gatherings, and remembrance circles.