Hello,
Just jumping in on this - I am at the exact same stage, I am using the end mill bit that came with the 3040 router I just got and am driving it around some soft pine at the moment.
It's all going OK but like you I am experimenting with feed rates etc.
I am getting very rough top edges in as much as it is not a nice clean cut - the internal walls of the cuts are really smooth but it leaves a burr most of the way around the top.
I have learnt that there are bits for down cutting and up cutting. I have no idea what I am using, I suspect I will just need to go and get a decent end mill cutter for wood. I am thinking that a 'down cutter' will work best for me in terns of having the clean top edge.
Does any of this sound familiar?
Kind regards
Richard