Further to Debra I would urge you to separate the tool from the professional. What your ambition should be is to become a great planner/scheduler. That will require tool skills plus knowledge of planning (eg scoping, depedencies, communicating with the team, influencing skills etc). Theoretically you could be a great planner no matter what the tool, even a pen.
Then it is always worthwhile getting more skilled in the tool, mainly so you dont waste your intellectual energy on the tool, rather you are focused on the project. The PMI scheduler accredtiation is a good objective to have. Getting better with the tool is also useful.
Amit, I like your carreer path as that is basically mine as well. It is a great combination of Project Management and tool support (you’ll need both). For a carreer path, you are looking either at a large company as a scheduler, a trainer, or a consultant supporting one of the major enterprise toolsets (like Project Server). Good luck. I would recommend any and all books, forums, webinars, and a position that allows you to practice what you are learning.
In parallel with learning Project learn how to schedule realistically and to create reports management want/need then demand so they can run their projects better. Remenber a schedule communicates how a project is going to be successfully delievered.
My recommendation is to get certifications. Preparing for the tests makes you learn more than you job is likely to ask for. I obtained a Microsoft Project MCTS for 2007 and PMIs Scheduling Professional. They are very diverse in content requirements and both very applied for my work with Project Managers. MCTS is knowledge directly in the MSP program and PMI SP is project management oriented.