Welcome as well!
In addition to what the other have said I found reading through the ‘Resources’ section on the website really helpful. It’s roughly in an order that’s easy to understand. I’d recommend giving it a read through while you wait for your CNC to arrive. That way when it gets there you’ll have an idea how it all gets put together and what to do after initial setup.
I recently started from zero knowledge myself and have had pretty good luck learning as I go so far. Having been recently through it I’d also recommend you think about the following topics. None of this is to scare you off - just things to think about while you are waiting for your new machine to arrive. That way you won’t be disappointed when you’ve got it all setup and aren’t actually ready to go.
What kind of bits will you nee for the type of projects you want to use?
Usually I’ve just used 1/8 and 1/4 end (flat) bits. Having a ball end is handy if you want to some nice rounded bottom things. If you’d like to do lettering I’d say a 60 degree V bit is a must have.
How will you hold down the piece (work holding)?
I built the ‘T bolt’ wasteboard shown in the resources section of the Sienci website and really like it. I built some ‘cam’ style clamps, but they don’t work too well. A flat two bolt clamp like they show works way better. My dad cut some out of aluminum, but I think cutting them out of wood would have been fine.
How will you manage dust?
Shop vac and the Sienci dust shoe seem to work great. My shop vac had the smaller diameter nozzle. I just duct taped one length of the pipe to the dust shoe so I can pull it on and off easily (kind of like a real DIY adapter hahah)
Will you be making your own designs or cutting ones you downloaded?
Even after downloading you can expect to do some tweaking (thicknesses, size, that kind of thing). I’ve spent some time looking at different tools and have found Carbide Create to be a nice balance between function and ease of use. For 2020 they are giving away 1 year pro licenses as well!
Where will you setup?
You’ll need roughly a 4’x4’ space for the machine itself, some space to maneuver around it, a spot for a computer and vacumm, and some basic storage (a simple tool box or drawer is fine).
As a final note I noticed that Sienci recommends using UGS to interface with the machine. I switched to CNCjs and have been liking it a lot more. Seems more responsive and reliable. Both are free, this is just my two cents.
What will you cut?
I’d grab some inexpensive wood to get started. MDF is cheap and flat, but throws a tonne of dust. Softwoods are inexpensive but have larger fibers and can ‘tear out’ a bit. Hardwoods are relatively expensive but cut very nicely. I haven’t played with acrylic or other plastic materials yet, but see others have had good results with them.
You’ll need a computer
I’d recommend an inexpensive Windows based laptop to get started (but this is just personal preference). It shouldn’t get dusty so moving it from the cutting area to other spots isn’t really an issue. A laptop is easier to setup than a raspberry pi, and can be used to both design things as well as to control your CNC.