I have some project ideas but they are too complex for me. I have domain knowledge but my programming skills are lacking + lots of ambiguity/confusion/uncertainty/fuziness while implementing.

I haven't delved into low level programming much but I will give it a shot. I do mostly scripting and automation - I want to improve my programming skills to the next level.

What 'type' of project ideas are this? don't need to share the idea, but in general: webapp,networkapp, desktopapp, does it have a GUI, is it a CLI tool, etc.

These different types will likely have very different learning paths and things for you to explore that will get you to a practical skill level in the areas you want quicker than going the assembly -> c -> c++ -> script engines route for example. This last one is really a long journey (to me atleast), and it will bare fruits only near the end unless you're into embedded stuff because hardly any apps these days are written in such languages (c++ being a bit more common).

I want to build a desktop gui app. Similar projects have 10000+ loc. It's math heavy and sometimes too complex for me while implementing. I haven't used chatgpt much because I wanted to improve my programming skills.

chatGPT is a bit like google or stackoverflow etc, but maybe more directed. Don't use it's code as it's nonsensical mostly, but it can definitely summarize well what directions to take.

Other then that, if it's math-heavy/complex, maybe start with parts. try to identify what you want to be libraries and core logic etc.

you could start by making a math library in C, maybe with some bindings to a higher lvl language you want to write the GUI code in. It will be quite a project in itself already, and once done, you have part of your goal completed.

Selecting, testing and experimenting with GUI code is also tricky. There's tons of different libraries out there. You can use existing, or even write openGL/Vulkan code and write your own. If cross-platformness is important, maybe look at things like .net maui etc. as it has that feature as a core feature.

Also, before writing anything, look into how to structure such large projects. Structuring your project will help in many ways, including deciding how to break up the project, where to start potentially etc. etc.

There's many ways that lead to rome, but most will be 'chunk it up untill the size of steps is so small you feel confident you can take a step, then take it'.

Feed your idea to ChatGPT and it can give you some basic ideas about what to learn.

I edited the description after reading some replies here.I will try to improve on those aspects you have mentioned and on writing clearly. Thanks

edit: I wasn't looking for programming courses exactly but I thought they might suffice. I haven't graduated yet and I love to work on challenging stuff in my free time.

I haven't graduated out of university yet.

I would appreciate anything that's challenging and helps me improve my programming skills.

Go for compilers then

It will significantly improve your understanding of programming langs, how some of them suck, what is possible, etc, etc.

It's not a course, but I definitely recommend the book "Deep C Secrets", I couldn't put it down, and had a similar feeling to being in a good, difficult, class.

hackclub non-trivial

I guess hn is suitable for teenagers as well.

Have you considered checking for sleep apnea or other sleep disorders/any other disorder?

It's advisable to consult with relevant doctors, get some tests done, and ensure you're not overlooking any underlying issues.

Relying on tips may not resolve the problem.