Jessa Jones created a set of vids with IFIXIT a few years ago which are very informative! Here’s the first in the series [https://www.youtube.com/watch?v=xFqA9u6y0Fk|Microsoldering with Jessa Jones].
Theres a lot to it! Between getting the correct gear, you need the skills to read and understand schematics and lastly access to the needed SMT components.
And lastly practice! Lots of it!