Step by step plans?

I adopted an adult dog 3 months ago. He’s 1.5-2years old and a small shih tzu mix. He is potty trained and generally well mannered but I really want to work on some training with him: general obedience, leash manners, cooperative care/handling, recall, etc. I have ADHD and am really struggling to figure out what to train, how, when, how often, etc.

I’m feeling really overwhelmed. Unfortunately, i live in a pretty remote area and haven’t found any trainers in my area to work with. My question is: do any resources exist that provide a step by step plan for training an adult dog? I really need a schedule of what order to train things in and daily/weekly action plans. I’d gladly pay for a resource like this if it exists or if there are reputable online trainers that would provide it. Any help appreciated!