Before getting changed into the Ihram garments, take care of your personal hygiene by clipping your nails and removing the hair under your armpits and beneath the navel. You should then do Ghusl, a highly emphasised Sunnah for those intending to enter into a state of Ihram. If you can’t perform Ghusl, doing Wudhu will suffice. Men may apply Attar/perfume to their heads/beards, ensuring not to get any on the Ihram garments. This should all be carried out at your place of residence before your flight (assuming you’re flying).