Please remember, This is only my opinion.Other hams will have their own opinion on how to set up a station depending your desired mode.
My desired mode of transmission is CW and SSB.So a simple mic and key was sitting on my desk at first.Then I graduated to Iambic paddles and a set of Heil headphones and boom mic as comfort is needed for prolonged periods of use.
Setting up your choice of gear is important for the sake of ergonomics.For example, weather your right or left handed or if you like to lean over your desk or "kick back"as I do.My set up as shown in this last pic demonstrates my choice.
Applying power to your set up again is important.All kinds of bad things can occur including personal injury,burning the house down among others.It would not hurt to have an electrician have a look at your needs before you start plugging things into the wall plug.
Also,consider R.F.is a different animal than your simple household current.
This isn't the usual house hold appliance we are talking about here.Especially if your wanting to be a "BIG GUN" operator.Oh! a BIG GUN means using an amplifier.This calls for a draw of allot of amps and or Double the average volts.
Calling out my electrician cost my only a few hundred dollars but saved me a lot of grief.I had a potential problem I didn't know about.So think before you act.Next setting up your antenna.