Blender Guru's Donut tutorial is regarded as the "Hello World" of Blender. Long tutorials will start getting boring after a certain period of time. So I would suggest following a couple of random Ducky 3D's abstract designs after this one. After that follow the OG IanHubert's lazy 1 minute tutorial.It contain only the core concepts remaining you have to explore and find out. Checkout Polyfjord also.