I agree that a reloading manual is a good place to start. I find them enjoyable to read and that I continue, almost 20 years later, to learn. I have more than a dozen, with the Speer and Sierra manuals being my favorite. Both have very good powder selections. Although many people prefer the Hornady, it, as compared to other manuals, often has only 50 - 70% the number of powder choices per caliber. Additionally, it would be wise to purchase more than one manual. I have seen instances where one book has max loads that are below the start load listed in another.
In addition to your press, dies, and scale, which are necessities, there are other, relatively inexpensive, items which are very useful. A powder trickler, calipers, bullet puller, case trimmer, and case mouth deburring/chamfering tool are all near-necessities. Many other items will prove helpful and will speed the process or otherwise make it more precise, efficient, or enjoyable.
In my experience, it is vital to go slow. Mistakes will be made, and time needs be taken to check and double-check each step. Fortunately, in tens of thousands of rounds, I've only loaded and fired one squib load. However, I have done plenty of stupid things that were caught in advance. I hate to admit this, but primers have been loaded upside down, rounds have been created with no primer, and much powder has been spilled. There's lots to learn, but reloading can also be very enjoyable.
Good luck and safe shooting.
Merry Christmas.