Here’s a link to Fender’s page for bass manuals: (https://support.fender.com/hc/en-us/articles/115005938763-Fender-Bass-Guitar-Owner-s-Manuals) . You can download one or more to your computer in case the link ever changes. The 2013 Universal one looks like what came with my 2017 P. Even if you don’t have a Fender, the measurements in there can get you pretty close. Except maybe with a Rick.
YouTube is full of setup how-tos. The ones by Elixir Strings are excellent: (Setting Up Your Bass Guitar: Adjusting The Truss Rod (Step 1 of 4) | ELIXIR Strings - YouTube). That’s the link for the first of four videos. I also like Dave’s World of Fun Stuff ones because he’s so irreverent and entertaining in the process.
Also, get the right tools, especially for the truss rod. If your truss rod takes an Allen wrench, be sure not to use one that’s too loose – you can potentially render the neck unadjustable if you round off the edges. But get good tools – sources include stewmac.com, MusicNomadCare.com (their F1 oil is fantastic for fretboard cleaning and oiling), PhiladelphiaLuthierTools,com, Skyscraper Guitars, and NeckCheckGuitars.com. Even if the initial cost of tools runs to $40 USD, that’s still less than a setup costs around major US cities. AND every time you change to a different gauge of strings, or the seasons change, or something just doesn’t feel right, you can make quick adjustments at no cost once you know how. Give it a try – it’s not rocket surgery. 
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