or, you know, touch some grass and don't burn out while waiting for the courses to start

I can heartedly recommend this one NandToTetris.

In this course gives you a complete understanding of how computers and programming qorks from first principle.

You'll start by (virtually) making chips with just a nand chip, than you'll make a cpu, ram and rom, evetually on to a full fletched computer. Than you'll write your own assembly language, parser and compiler for that computer. You'll write your own OS and your own higher level language (OOP) and eventually you'll write a geme (tetris) in that language.

This is of course all very simplified, but very educational.

If you want to learn how programming languages can go from text in a file to something a computer can process, I recommend either:

Programming Languages: Application and Interpretation

or

Crafting Interpreters

If you want to know how a computer processes the information, I recommend:

NandToTetris

If those are too much for your level of programming knowledge, I suggest one of the following to get up to speed:

A Data-Centric Introduction to Computing

or

Structure and Interpretation of Computer Programs

I recommend taking a look at https://roadmap.sh/. It's not a course, it's a website with several "roadmaps" for learning languages or specific fields. There's plenty of docs and it's easy to follow!

I think there are good free online courses, like Harvard's CS 50 course. I've also heard of OpenCourseWare. I haven't used either of them personally, though.

Do you know what classes you are going to be taking? If so, fnd the syllabus and take note of the topics and the text, if one is mentioned. See if you can find any mention of material your school may have used previously and get yourself a copy. Find the topics in the book and work through the exercises as you please.

Download SICP (find with search engine), read through it and do the exercises.

Read through the HTML5 spec if you want to do anything frontend related. Yes, it can be boring at times, but using a TTS extension for your browser helps a lot.

It'll teach you which HTML5 tags exist, which attributes exist for each tag, which tag goes within which tag, etc. Very helpful if you want to actually learn an up-to-date HTML5.

It will provide a very good fundamental knowledge before you start learning whatever popular JS framework exists in a few years.

What language are you looking for? If it’s C++ use learncpp.com , if it’s Kotlin use Kotlin’s learn by example .

Depends on which programming language you want to learn.

https://www.w3schools.com/ is a good resource for the basics in some of the most used programming languages and a good reference for looking up how things work.

Most learning of programming is IMHO learning by doing. And by breaking things.

Think of a program you want to make (or one you want to replicate, just for learning purposes) and set this as your goal. It doesn't need to be perfect, optimized or even fully functional. Just grab a hot beverage of your choice, sit down and try.

There are plenty of (sometimes even free) books with examples how to use the programming language of your choice. If you want to go that way, again, grab a hot beverage of your choice and start reading.