How can one deal with family and societal pressures and materialistic temptations after being arrested due to Islamic activism?

There must be tribulation and patience, and the precious price must be paid to attain Paradise. So, you must be patient, seek Allah's help, rely on Him, and continue inviting to the true religion. For the enjoyment of this world is little compared to the Hereafter, and forgetting the delights of this world with a single dip in Hellfire indicates the severity of the torment of the Hereafter. You must be patient, steadfast, and mend relations with gentleness and wisdom.