Save offline. Pull up word, or notebook. Have a dedicated "This is where I write" spot at home. No youtube, no lingering on other sites while sitting there. put on some music if that's what you like to do while working, anything to get comfortable. write a bit. You aren't writing to post THAT day. Don't worry about look back over it to edit this or that unless you had a really great idea. just write.
If you're doing schooling, do your studies, do homework do everything else needed first. I get home tired, and sleepy, sometimes even forget to eat. there's no point on slugging yourself through classes if you're just going to fail them. if you INTEND to fail them, drop out and save yourself the sanity. If you really do intend to pass, and slug through, make sure to make it worth your while. passing classes comes first. that's just the way it is. Do the work..
If, and when, you're done with school work for the day (which it feels like it never ends, i know), take a second to stretch, and move around. then sit in your writing corner. as long as you enjoy what you're writing, it'll flow through you. give yourself an hour or two if you have the time, time limit yourself as to not burn yourself out. eat. go to bed at a decent time.
Leaving off at a part where you have ideas moving forward, gives you motivation to come back and continue writing. saving offline makes sure you aren't opening up your browser to accidently catch a glimpse of something else to get distracted.
It's just you, and the blank page, that's all you need to write. Anything else is bonus content you need to pay for with attention.
If it's only a few hundred words, or a thousand, that's progress. Personally, I shoot for 2k words per update, (give or take a few couple dozen). When you have your personal updatable amount of words, save, update. open up a new doc, new page, next chapter. rinse repeat.
writing should be enjoyable. if you aren't feeling it one day and would rather sleep, sleep is important.
but try to get at least 2 updates per week. maybe one Monday, the other Thursday. schedule yourself, but don't overwhelm yourself.
This is for fun. It should be fun.