Personally, I started writing after many years of excessive reading, so I fall back on my memory of things I've read for examples of what to do or not to do. A few things I can recommend -- try to avoid repeatedly using the same word or phrase. As an example, if people are speaking, use a combination of said, responded, replied, remarked, interjected, exclaimed, and other similar words. If you just always use the word said, it gets very repetitive and less interesting.
On a similar note, I prefer writing from the third person perspective 'attached' to a character, so you only get their thoughts, and what they consider important. They might not notice the bugs on the foliage because they are focused on following the trail and looking at the sky, so you would describe the path and the way the sky looks. This helps keep you attached to the character you are writing at the time, as well as helping you control how to describe everything.
I'd also recommend trying to put yourself into the position of your characters mentally, and consider what they would think or do with their personality. Just assuming everyone acts similarly will lead to boring characters, in my experience, as many people have different motivations, likes, dislikes, talents, etc. Similarly, if two people travel through the same area, they might focus on different things, allowing you to swap viewpoints and describe places in more detail on different visits to them, while still feeling natural.
I would also like to recommend looking at writing prompts and trying to write short stories just to test your creativity and expand your views. I've got a large collection I picked up over the years, and sometimes I just look at one and try to create a world where that situation exists and see how it works out. I haven't posted any of those however, but some of them make great ideas to spin off into their own story to share.