Inquiry regarding treatment for combined pigmentation of melasma and freckles

My biggest concern is that I have a combination of melasma and freckles, making my overall skin tone look dull and messy. Every time I look in the mirror, my complexion looks dark, and I want to resolve this. I have a few questions, so I am asking here.

1. Types of effective procedures: What treatments are commonly used for complex pigmentation like mine, which involves a mix of melasma and freckles? I have heard that procedures such as Pico Toning and IPL are effective, and I would like to know the differences between them and which treatment is suitable for my condition.

2. Concerns about side effects on sensitive skin: I am worried about getting burned after a skin laser procedure or experiencing a 'rebound phenomenon' where pigmentation actually darkens. Are there any low-irritation treatments that are safe for sensitive skin?

3. Number of treatments and duration: How many repeated treatments are usually required to see visible results? Average treatment cycle,

I would appreciate a sincere response!