Lol---I got pretty good at it over the years, to the extent I did a basement-sited sump, replaced bulkhead connectors in a total tank refurb, and then undertook a 5000 gallon outdoor pond with a pool skimmer, waterfall, and adjacent stream and pond. It's all one job, just scale.
Just remember not to use metal in saltwater: it's ok in fresh; don't use copper on the tank-ward side of your ro/di filter, but it's ok upstream of it; don't overtighten a bulkhead connector (a woman with a fairly strong grip can hand-tighten most joints quite enough) and don't obsess over an underwater leak: what leaks underwater is just not a Big Deal, and often the ability to snatch off a hose and reconfigure is an asset. Hose barbs are lovely things. So are loc-line connectors, if good ones. And you can get creative. I hose-clamped a loc-line connector INSIDE the end of a 1/2 inch hose to reduce the hose to 1/4 inch for topoff.
Do remember too that hose is always given in TWO diameters: always ask if your measure is inside diameter or outside. That saves you getting home with a lot of expensive hose that now requires adaptors to make it work.
But never give up a part or a stub of hose: having a drawer of adapters and connectors is a good thing: after a couple of decades in this hobby, you should have an array that will let you fix anything from your bathroom to a pond pump to your regular marine tank.
