Hello @Shokes, welcome to the forum.
Coding on mobile can be quite detrimental, mainly due to sheer difficulty of using text-editor efficiently.
At the end of the day, coding is nothing more than writing a text on an editor, then asking some program to interpret and run it.
Moreover there are lots of different editors for pc with extra features, like code highlight, easy copy / paste, search, file tree view and so on…
As far as I am aware there are limited options for such programs on mobile, and I personally never tried one.
Just for some context, on a laptop you can open any editor (even non coding related one), type some HTML and CSS and save it.
Then you locate the file and asks your preferred browser to open it and…
it’s done! You have a working local copy.
On a mobile (let’s say an iPhone), even if you do the same on the Note app, then there’s no way to ask Safari to open it.
So, for the time being, you can solve some guided task on an online platform like FCC, but eventually you’ll reach a point where you want to try something on your own, and I’m afraid you’ll need a computer for that.
But rest assured, as long as you don’t try some complex computing like model rendering or game development, a cheap laptop will suffice, you don’t need the highest end of technology.
Good luck and happy coding 