nylon hard to print not probably what you want..maybe PETG just go my first roll and have not opened it yet but I hope it is the bees knees for mechanically strong parts.
Slicers I got Simplify 3D $140 as it is what MakerGear recommends for the M2. No matter which slicer you choose, there is a steep learning curve, 3Dprinting is not plug and play. This is like a black hole.. your time just gets sucked up ..
Cad software, I choose onshape as it is geared to professional engineers but it is free, with the caveat all your designs are in public space.. Easy to learn the basics and powerful if you put the time in (have not done that yet)
My advice is to save your money, commit to the hobby and buy a higher end printer that has a track record of quality and reliability. There are too many other things to deal with and having a finicky printer on top of it would be enough to cause me to quit before getting started.
Good luck