Happiness needs a meaningful life, which means having purpose(s). But this journey you need to do on your own, others can’t do it for you. Off course they can advice/guide from afar.
I found my purpose at the intersection of my passions, talents and societal needs. Vedanta calls it four Purushartas, Japanese call it Ikagi. Basically you have to architect your own life.
Helpful pointers-
Act- try different things, learn, fail & try next, till you find your groove. No perfectionism & analysis paralysis.
Help yourself - No dependence on “life coaches “ or “therapists”. Guidance from family, friends & few day workshops, retreats, outings etc are ok.
Relationships - Can make or break you. Nurture those that care for you, help you and give you the space. Ones that drain, maintain your distance. Be open to blunt views from well wishers.
Hope this helps as this is a lonely road we all have to travel few times in our lives without any manuals. I think Victor Frankl’s Man’s Search for Meaning & Bhagavad Gita - 2.47 & 18.47 are great pointers.
In closing don’t take life too seriously - have fun, make mistakes, travel, build bonds, serve, focus on others and stand for your values. Spiritual Trinity - Sat(Existence], Chit(Consciousness) & Ananda(Bliss). Good luck to all on this quest.