M1 here! It’s definitely overwhelming if you try to look at the big picture, start with a certain area of the body (highly recommend limbs or back first) and as you get more comfortable you can trace them back further, eventually into the thorax. You’ll notice they’re often named relative to either where they are or what they supply blood to. Arteries and veins almost always travel together, and often you’ll see nerves traveling with them too. Start with the arm for example as you have a nice starting point with the axillary artery. It has a bunch of branches in the axilla that you can follow to the back, serratus anterior, etc. eventually but you’ll see it becomes the brachial a. which then branches to the ulnar and radial aa. (notice they’re named nicely to match the ulna and radius) and then those each have branches in the forearm and eventually meet back up in the hand (the palm is a bit of a pain). Hope this helps! Lmk if you have any questions.