One of the rites of passage when you begin your journey into software engineering is customizing your tools to suit your personality, you're going to spend a lot of time working with these tools so it makes sense to tweak them to your taste. One of the first tools a software engineer will get is either a code editor or an IDE (it's like Microsoft Word for writers or Microsoft Excel for data analysts).
I changed the theme of my code editor (visual studio code) from black to color red because I thought it looked cool, nobody told me it wouldn't work, there are just somethings you figure out on your own. After a while I switched to a much darker theme. In movies and reality, you typically find software engineers using dark themed tools, we're so used to dark modes that even our normal apps are in dark mode.
The above is borne from the realization that when you spend hours in front of a bright screen your eyes will suffer, you can also get disoriented at a point. As an inside joke we often say bright (or light) mode attract bugs. Two things which can somewhat impact your beginner journey are your theme and font size, it sounds weird but it's true.
Darker themes can help with spotting errors because your code contrasts better against dark backgrounds, you're also able to read code better and code a lot longer with dark themes. When you feel your eyes go heavy or when you feel yourself confused or disoriented you really should take a break, I know time flies when you code but it's necessary that you take frequent breaks. Your font-size is also a key thing. Make it as big as you're comfortable with. Nobody ever got a prize for using the smallest font size, settings like "word-wrap" in your code editor can help adjust the flow of the code to keep it on one screen. Make yourself as comfortable as possible when coding, it's the least you can do.