E-flyer for marketing my services

I am looking to get a fairly simple e-flyer created, or something like that, which I can post on LinkedIn, Facebook, Instagram, WhatApp etc, which can easily be shared. I've just gone back to London estate agency after many years out, and need to quickly build up a network of contacts to gain instructions/listings for both sales and lettings. I'm hoping to receive recommendations off the back of it from friends and friends of friends.