new to CNCing, what bits are essential to get started . Only wood and MDF ,

Good evening chaps,
i am new to a CNC , taking it up as a hobby since retiring, just bought a decent machine and now need a few bits but not sure where to start.
will initially only be playing with ply , MDF and maybe some walnut as a few lumps hanging around

will be using A makita 1/4 router

probaly be trying my hand at some sign making , some 3 D relief to go onto a box top and some general cutting out some plans

any pointers what bits i should buy and where to buy from other than Amazon
cheers
dan