It's obvious that at least one thing is working very well; and that's your attitude! Bravo!
Yes, things will improve rather rapidly. What you experienced shows the need to practice in your backyard (or City park in my case) before straying far from home.
You need to use tree straps of a length appropriate for where you hang. That can vary widely from one environment to another.
Underquilts can take a bit of trial and error to get them right. It's probably a good idea to take more insulation than you think you will need, until you get good at this.
The fact is, some hammocks are better for side sleepers than others. I'm a side sleeper. After trying different hammocks, I found the Switchback to be the most friendly to side sleepers.
"Life is a Project!"