Learning is fun and mostly FUN.
If it helps, my usual setup routine:
1) Get to engineering if I didn't spawn there. This may or may not be difficult, depending on how late you've joined the round and what else is going on (i.e. do you have power or not).
2) Set up SMESes. 200k input, auto-charging, 100k-ish output (more than enough to run everything on the station).
3) Optional, but I do it: turn off the output of one of the SMESes, temporarily. This may mean that the other two run out of power faster, but it avoids the potential issue of
completely running out of power before you've set the emitters, which would be bad. If you really want to tweak things, don't turn the outputs of the remaining SMESes up to 100k-ish yet, to conserve what little power you have at round start.
4) Set up particle accelerator. Scan the parts when setup, but don't start it up yet.
5) Fill plasma tanks to full. Optional, but immensely recommended.
6) Load plasma tanks into collectors, activate collectors and, for the love of god,
lock them using your ID. This stops random people cunningly deactivating the collectors later on (which is less noticeable than turning off/on the accelerator).
7) Go back to SMESes and turn on the one you turned off earlier, if applicable. Double-check settings.
Go outside. Activate all the emitters. Get back inside without being fried.
9) Immediately go to the accelerator and turn it on, and up to 2.
10) With meson goggles on, stand at the south end of the accelerator room. When the singularity grows to its second size (3x3), you'll see it start moving around. If you filled up the plasma tanks to full, you can stabilise it now, or you can wait until it's 5x5. Or 7x7 if you're mad/showboating/potential tator.
11) Stabilise it: switch the particle accelerator to zero but
leave it on. You may vary this step if you're going for 7x7, you madman you.
12) Check SMESes are charging and that input/output are set correctly.
13) Go and hook up your solars, mend the inevitable fires/explosions, and generally wait for people yelling, "Why don't we have any power in virology!?"
14) Read up on APCs, station wiring and/or atmospherics. Actually, read up on atmospherics. If you've got a stable singularity, Atmosia is likely to be the alternative that any traitor goes for. Because it's amazing.
15) Alternatively, screw this station, and go build your own secure hidey-hole somewhere. Preferably at the north end of the station, as far away from that damn black hole as you can get.
Edit: I missed one:
Whenever) Set your Engineering APC to power equipment
always, not on auto. While the emitters run directly from the main grid, I'm pretty sure that the accelerator counts as engineering equipment (somebody please correct me if I'm wrong - I haven't dug into engineering's wiring enough to verify this). You don't want that turning off in a brownout. Lighting and environmentals can stay on auto - they're actually less important.