Thank you all VERY much for the responses.
Lots of informative and useful posts.
Someone asked if its my first airline job, and to answer your question, yes it is.
At the moment being new to all of this. Not just the aircraft but also real world flying, would it work out fine for me if I just used the simple method of, altitude to lose X 3 plus 10. If my track miles are more than what I get from this simple formula, obviously I'm below profile, and if less track miles than calculated, I'm high.
In addition to that, I can Increase speed Or use speed breaks to descend lower, decrease speed to reduce V/S.
Would it be okay to use this simple method for now, not to complicate the whole scenario even more, as basically EVERYTHING is new to me at this point.
Also, yet another stupid question.
What is the difference if I increased V/S, or just ncreased speed.
I believe ncreasing V/S will increase speed as needed to give the V/S set.