Technical Python Tips

I know how to make basic programs (some object-oriented) although I would like to learn technical Python. By that I mean things like the coding challenges. So Floyd's Triangle and HCF. Also things like implementing algorithms and machine learning. I would love to participate in coding challenges but half of the time they are way too hard for me. Does anyone know any tips or exercises to practice 'technical' programming? I feel it would be very useful for me to have this skill