Zinni Honestly, just keep writing. I've been on here for almost two years and I would see the difference by going through old chapters. You'll learn to pace things better, being able to fix your writing so that readers on any platform can read easily (for people on mobile, one long chunk of a paragraph can be hard to read on a small device as it becomes vastly larger/compressed than on PC . In my early chapters readers on smaller devices had trouble and lost their reading spot often so I grew accustomed to creating new paragraphs often when I felt that it was right.)
Tip #2. If you wrote a complete chapter and don't like it, leave the chapter alone (don't publish yet) maybe overnight and come back to it, reading it with a fresh mind. Sometimes your mind thinks faster than your fingers so you could really take the time to absorb the chapter without having to think about what's next. This could help fix things like spelling, accidentally skipping a word you though about but didn't write, and maybe if there's a part you don't like, you could change it to still fit what will happen later in the chapter or earlier. Sometimes knowing exactly what happens is easier to write off of than having vague ideas.
If you're really stuck and not really sure about it, asking in the forums is a good idea but if you join the authors discord, there's channels for help. The elders on there and on the forums are all wise ancients who I'm sure wouldn't mind giving a few tips.
And don't forget about your biggest supporters, YOUR READERS! (7>3<)7"
Communication with them is helpful as well since they could catch mistakes your eyes overlooked.
From one author to another, hopefully this helped!