Another so sorry for the loss of your mother and a warm welcome.
Posting pictures here is a bit convoluted but once you get the hang of it and your particular set up, it is doable.
One of our administrators has a pretty good PDF in the help section:
Including Images and Attachments (as of 24 Jan 2020)
Some people who post from phones have settings and things they have to do.
Poster Ourworkbench has a nice concise explanation of the process, here is one copy of that:
Id help
I've never been able to get the paperclip icon to work myself, I think it has to do with my browser protections. I go into the "Go Advanced" tab -- but I'm using and old school digital camera and one thing I know is my initial file size is way too large and I have to reduce the file size. Not the picture itself, it comes as a thumbnail you have to click on to enlarge,but the file size. You can load several images per post that add up to somewhere close to 5 MB,but each picture seems to have a 2 MB limit. I use this free, fast and easy website to download the photos on my computer so I can upload them on site.
https://www.reduceimages.com/