The best "channel" is to channel your energy into actually writing code and not watching videos. You only really learn if you try to recall how to do things. If you just watch a video and never try to do the same, then you'll forget about it by the next day.
I'd recommend finding some tutorial sites, following their guides, doing the exercises, then coming up with your own exercise, and trying to write code as much as possible.
I'll put here just one tutorial for both (C++, Python) languages, but there are plenty out there:
- https://www.w3schools.com/cpp/
- https://www.w3schools.com/python/default.asp
Some exercises you could do to practice would include mathematical problems, simple catalogue systems, simple games, etc. Here are some concrete examples:
- Find the first n primes.
- Find palindromes.
- Calculate curcumferences/areas/volumes of various 2D or 3D objects selected through a simple text-based menu.
- Write a simple car hire system. Text-based. You can list available cars (maker, model, year), store when it got hired, for how many days, and by whom (person: name, driver's license, address, phone). You could store this in a file system, save/load.
- A simple game would be like a number guessing game, or hangman, or maybe a text-based adventure game.
Good luck and enjoy your learning adventure!