Salam, I read the ask from another person about feeling a lack of passion and I related to this question. But for me, I feel a lack of passion because I don't know how to correctly repurpose my passions to serve The Lord. For example I love painting and writing speculative fiction. But I don't know how doing that could help my Akhirah, especially because a lot of Muslims refer to this as a waste of time, and so I lose motivation and passion and end up wondering around lost.
Alaikumassalam wa rahmatullah,
If you sincerely ask God for guidance on how to make yourself useful, then He will show you the way. God does not guide those who are proud, heedless or sinful, therefore a person who truly seeks guidance should begin by purifying themselves from all sins and insincerity. The next step would be to dedicate an extra amount of time everyday to God’s remembrance, such as reading the Quran for an hour everyday. And it is at this point that you can ask for guidance knowing that God will guide you and will be with you every step of the way.
I would think that painting and speculative fiction are ideal places for a Muslim eager to serve God. You could create meaningful art or write inspiring and meaningful fiction.