Hot air soldering of hot air fpc, connector board, connector battery o

I bought a hot air soldering iron with a flask and tips. I would like to solder an FPC connector plug and connector board in a Samsung Galaxy m31s m317f, but I don't know what else I need to buy, maybe some paste, because I have TOPNIK AG TERMOPASTY RF800 50ml NO-CLEAN LIQUID FLUX WITH BRUSH FOR SMD, soldering rosin, solder, and I have paste.