DAK

I use Fotki. It costs around $ 25 per year, but it is truly ad free and easy to use.

So you aren't actually posting your photos. You are setting up links to where there are stored.

First thing you need is to find a site to host your photos so you can upload and share them online. There are a large number of photo hosting sites, many are free, (but often with advertisements or other annoyances), others you pay for the service. Here are some of the most popular free ones, along with brief descriptions of services; 

https://www.lifewire.com/free-image-hosting-sites-3486329

Once you have your images hosted, it is a rather simple process to copy the url from the page your photo is hosted on and paste it into the "insert/edit image icon", (5th from the left on the above toolbar) and away you go!