There’s a bit on tooling at:
and the community has a bit more at:
and it’s also discussed in:
Which trim router do you have as a spindle? Do you have a 1/4" collet? (ideally a precision one)
What sort of material do you wish to cut?
Assuming wood, my recommendation would be to start by dropping by your local Lowe’s or Home Depot or specialty woodworking shop and picking up a 1/4" uncut spiral router bit such as:
https://www.homedepot.com/p/DIABLO-1-4-in-x-1-in-Carbide-Up-Spiral-Router-Bit-DR75102/100660697
(or purchase a #201 pack from: #201 .25" Flat Cutter (Qty 2) - Carbide 3D )
That should allow for basic pocketing and profiling to a reasonable depth as a start.
Beyond that, what you get depends on what sort of cut you wish to make:
- 3D — a succession of ball-nosed tooling in various sizes
- V carving — V endmills in sizes and angles appropriate to the scale of work you are doing
- joinery — whatever specialty tooling that requires
If you’ll let us know what you wish to accomplish we could better advise.
Note also that if you’re able to use a recent version of Carbide Motion you can update to the latest Carbide Create which will help a lot.