What should I do regarding making up 28 days of fasting that I broke without a valid excuse during Ramadan, and am I required to fast continuously for 4 years and 8 months, and how can I return to acts of worship after losing hope?

Praise be to Allah, who guided you and accepted your repentance. One who repents from sin is like one who has no sin. The major expiation for breaking the fast (Kaffarat al-Fitr al-Kubra) is not obligatory for you, because it is only required for breaking the fast through intercourse. What is obligatory for you is only to make up the fast. You must fast the days you missed, and you must feed a poor person for each day you delayed making up the fast without a valid excuse, unless you were ignorant of the impermissibility of the delay.