Hello.
If you want to purify the pingala, you should try this meditation on a regular basis, once a day is enough, but it is better to repeat the exercise several times per session:
https://templeofzeus.org/Serpent_Meditation_II.phpExternal ↗
Hopefully you have already done meditations up to this level, if not, there is a simpler exercise, it will need to be done longer, twice a day, daily:
https://templeofzeus.org/Kumbhaka_Lunar_Breath.phpExternal ↗
You need to purify the chakras, then you can do sushumna, ida and pingala. The channels will become balanced as they merge into a single flow.
As for nasal congestion, try ointments based on: menthol, camphor, peppermint, eucalyptus and cloves, dab them on the sinuses, you can use essential oils on the same basis or an inhaler patch.