Seems a very decent plan, good to know your role within the side, and ensure your captain requires you to play this role.
Don't think you should stick rigidly to this, as situations and conditions can invariably be different and will require an alternative approach. Flexibility and the ability to assess the situation will come with experience, but there will be times when a different approach is the best way to go.
For example if you're chasing a decent score and are batting with a lesser experienced batsman that's having a tough time getting the board ticking, you may be required to take one or two more chances than is ideal, but a different approach is better for the side, therefore you may need to shelve your ideal plan.
The rotation of the strike is crucial for an opening batsman. With attacking fields in place at the start of an innings there should be plenty of gaps, and this is seriously frustrating for the bowlers to guide the ball into gaps and get down the other end.