Like most everything in fly tying, it depends...
... on what kinds of flies you are tying and what you are trying to accomplish.
Having said that, I haven't used wax or head cement for years. ( I do use flex seal on some deer hair bulletheads to strengthen them, but that's about it. )
Just making the point that you may not need cement and wax. You might be better off starting without them and determine for yourself whether you want to add either or both to your tying process.
John
The fish are always right.