Need some tips on using hot air soldering station for my project
You've designed a board with very small components that will be very hard to hand solder and then decided that you must use hand soldering.  This is a bad idea, when you design a board you should lay out components such that you can assemble it effectively.  But since you have the boards and probably want to try and use them, I think you have two options:

Find someone with a reflow oven or build a basic one.  This will raise the temperature enough to reflow the solder but not too much that you melt plastics.

Hand solder it.  This will be harder, but is still possible.  My advice would be to use a soldering iron for as much as possible.  0201 components are not easy to solder, but can be done with a fine chisel tip.  Then, rather than reflowing the entire board with hot air (which is really hard without a hotplate), turn up the heat on your hot air, get a small nozzle and reflow  just the individual components that you cannot use an iron on.  Switching to lead solder will make this easier since the temperatures can be lower, giving you more margin for error although lead free can certainly be used as well.