Fast Track to engraving:
Best thing I ever did was to get hands on lessons from a professional engraver. You can watch videos and read books on the subject all day long, and not understand how easy some things are, and how important other things are. The most critical thing is the sharpening. Once you can create and re-create a good point, the rest is all downhill.
I took lessons from Jerry Huddleston, and went to class at GRS. Best thing I ever did for my engraving.
Steel is more consistent than brass to engrave. I find it easier to cut, as it doesn't workharden like brass, nor is steel 'sticky or gummy' like some brass can be.
On sharpening, a template system, or some kind of quality jig that gives you repeatable angles is a huge time saver. In the beginning you will break your point time and time again. You will appreciate a jig that can rapidly restore the tip geometry. Lindsay makes a template system, and GRS makes a multi-angle fixture. Avoid the 'crocker' fixture as it is poorly made these days, and is wasted money.
Keep practicing. You're developing your muscle memory for engraving, so the more you do, the more natural it will become. Try to find a local engraver who can show you his/her sharpening method.