This spell was apparently popular in the Victorian age, because occult things were considered to be in fashion back then. If you're really keen on witchcraft and want to try summoning one or some other kind of demon, I suggest doing more research and find a different version of the spell. There are many spells for summoning demons for example. It takes very little effort to simply change the name of the demon to Lilitu or Lilim. Most spells like that require that you actually know the demon's proper name however.
Clearly mark the floor with a white chord and take 3 black candles (or 5) and place them equidistant apart.
Outside the circle, have 3 or 5 (same number as candles) protective talismans or sigils around you.
Also, if possible, create an outer circle made from crushed protective herbs mixed together. Calm yourself and relax.
Center yourself. Now, visualize the circle around you, protecting you and separating you from the rest of your house. This is *essential*.
Once you have done that, and the candles are lit, lay in the pentagram position (arms straight out, legs apart) and summon the succubus (I suggest this over an incubus because of the different nature of a succubus over an incubus).
Feel her come into the circle and feel her power. Feel her coalesce into a physical, or semi physical form and now you'll be able to interact with her.
She should be easier to invoke and banish than a Incubus and I suggest a successful encounter with her followed by a successful banish of her before attempting the more aggressive Incubus. Always do these at the new moon.