I’ve been dropping links to resources I’ve found useful in a few threads based upon topic. Different people absorb information in different ways though and different people have different levels of pre existing knowledge. Khan Academy has lots of courses designed exactly to help by providing a more structured pathway. They generally cover what you’d consider as school level, everything you can choose to learn up to around 18 years old, so you can get quite a long way in understanding the topics. Sign up for an account and you can track your progress and it's all free. Khan Academy Biology Pathways High School Biology (structured high/secondary school level courses including quizzes and progress tracking, start here or pick just the units you are interested in, similar to GCSE level, very accessible) https://www.khanacademy.org/science/hs-bio Some specific sections likely of interest include From Cells to Organisms https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms Gene Expression and Regulation https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:gene-expression-and-regulation AP/College Biology (structured AP/college/6th form level courses, similar to A Level, good if you have a basic understanding already or want to explore these topics in more detail, still accessible) https://www.khanacademy.org/science/ap-biology Some specific sections likely of interest include Cell Structure and Function https://www.khanacademy.org/science/ap-biology/cell-structure-and-function Gene Expression and Regulation https://www.khanacademy.org/science/ap-biology/gene-expression-and-regulation Health and Medicine (various sections on the human body to explore, just videos and information, no courses or quiz structure, targeted at the general public) https://www.khanacademy.org/science/health-and-medicine Some specific sections likely of interest include Immunologic system introduction https://www.khanacademy.org/science...-phagocytes-in-innate-or-nonspecific-immunity Nervous system interaction https://www.khanacademy.org/science...ous-system-introduction/v/anatomy-of-a-neuron Biology Archive (just videos and information, useful to just pick a topic and explore, includes lots of videos used in both of the above courses, no courses or quizzes) https://www.khanacademy.org/science/biology
