How to start

[TomG]

Let's see if I can address a few of your issues:

1) The scale is just for a rough location, most mills don't even have one. You need to learn how to use the dials. A DRO would be a nice addition, but not a necessity.

2) A 16mm end mill is getting on the large side for a light bench mill, especially for milling deep pockets. Chatter is going to be a continuous issue with that light of a machine, but the solution is the same as for any machine. Keep setups as rigid as possible with minimum overhang on the tools and workpieces. Also, don't concern yourself with feeds. If the cutter is resisiting, slow down the feed or reduce the size of the cut. Basically just listen to the machine and adjust accordingly. 300 rpm is way too slow for a 16mm end mill. It should be around 650 for steel and  3000 for aluminum. Watch my video on cutting speed to get a better understanding of what rpm to use. The formula I provide is in Imperial units, but you can convert your diameters or find a similar formula for metric applications. BTW, plunge cutting is the proper method of roughing out a pocket, but you may need to greatly reduce the size of the cut or switch to a smaller end mill to reduce the chatter.

3) Watch my cutting speed video.

4) A circular pattern is normal for a face mill.

5) A boring head is useful, but you should learn the basics and your machine before getting one.

6) Not sure I understand this one.

Tom