Unfortunately the manual for the Blackout isn't very detailed, all they give you is an exploded parts diagram for you to figure out on your own how things go together:
https://www.horizonhobby.com/on/dema...-Manual-EN.pdf
That said, if I were you I would go through a manual for a similar car that is based on a kit which gives you step by step instructions. The following example isn't going to be exactly how your car goes together, but will give you a very detailed look and will be filled with lots of build tips to keep in mind:
SCT410.3_instructions.pdf
As far as selecting electronics, I would consider the following:
https://www.hobbywingdirect.com/prod...nt=26983763784
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3650-3100KV 4 Pole:
https://www.rcjuice.com/motor-esc/br...aterproof.html
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https://www.rcjuice.com/lipo-batteri...o-battery.html
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Which charger is the best?
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What gearing for upgraded electronics?
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Maintenance Tips
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Tools for the Pit Table
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Which Soldering Iron is the best?
Here is a build thread which also covers most of the information you will need to learn as well:
Good Luck!