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@piersquaree bro if you want to do competitive programming then “Luv competitive programming” is one of the good playlist which is freely available on youtube, the second thing is you can take the coding minute CP course which is also best. other than all the courses are the worst including coding ninjas, coding block, and other platforms as well.
Free ki advise: If you want to be really good at cp I will suggest problem-solving is only an option and I will suggest atcoder , codeforces for this.
there are lots of videos on youtube so you can watch them and start with CF or atcoder, which range of problems you need to solve etc