Ignore whoever told you that a gaming standard computer is necessary.Just about anything will do the job.In the distant past I was using a 450Mhz Pentium 2 with a mighty 64Mb RAM to generate 5 axis toolpaths with Windows NT.You would find it almost impossible to buy a computer that isn't light years ahead of that.Clearly a super high spec machine will do in hundredths of a second the things that a more humble computer would take tenths of a second to accomplish.Which in the overall timespan of completing a hobby project is of very little significance.

The challenge thats looming will be to resist trying to use the machine while gaining a level of competence with whatever software is chosen.Good software is essential and often expensive but you absolutely have to have something.A few troglodytes insist that typing Gcode is as good as it gets and like to sit in front of a keyboard with a print of a part and a calculator as they input Gcode for the tool centre path.They tend to have encountered CNC in the eighties when such stuff was common and have never seen how much more can be accomplished if you let the machine that otherwise gets used for posting nonsense on social networks do the same task in a fraction of a second.I know nothing of CamBam but it has ben around for a while,Fusion was extremely popular until the subscription model was introduced and I suspect a good number of people are paying up rather than learning the quirks of another piece of software.Vectric is something I have little knowledge of as a pal has it and it is very quick at generating toolpaths,it does use quirky vocabulary and the CAD side is less than stellar at least at Vcarve level.For my hobby machine,I went with Freecad,in part because I had some prior experience with parametric software and also because it had a post processor for the LinuxCNC that runs my hobby machine.I am very happy with it but for a newbie to 3D modelling it might take some getting used to.

One way to have a bit of low cost fun is to download F-engrave and Camotics.The first will allow you to create toolpaths for engraving lettering or clip art and the second will allow you to watch the simulation.Its always a good thing to run a simulation just in case a retract height is insufficient or some other woe is lurking to snare the unwary.Have fun.