PC Cleanup and SSD Migration

I need help to clean my personal computer as well as my onedrive and migrate files to an SSD, as well as help downloading some photo's from a deceased friend's icloud i also have acess too.

Requirements:
- Backup all data before migration
- Migrate documents, photos, and applications
make sure i dont lose any expesive media apps like final cut pro or anything

Ideal Skills:
- Experience with data migration
- Familiarity with SSD setup and media editing software
- Strong data backup and restoration skills
-strong concept of data file structure
-help reorganizing that
-my computer is fucked