The following would help you :
1. Daily use of gel based sunscreen in day time of SPF 30 applied half hour before sun exposure to prevent darkening of spots.
2. Daily bed time use of retinoid cream.
3. Procedures like microneedling rf, fractional lasers or just microneedling for scars are helpful and necessary. Chemical peels for acne and spots.
You may Send further queries/ pics of lesions on private follow up chat.
Hope this helps.
Warm regards. Dr Govind S Mittal, excel care hospital, Bangalore.