Graduate Engineer at Pivot Engineers
A vey well thought out goal and it is something achievable. A successful career as a structural can be achieved by the proposed plan. Just a quick something about structural engineering is that the field involves a lot of structural design and the education involves a lot of math so that is plus. It pays to have a good artistic touch in order to appreciate the architect's vision and be able to cater that (as a structural engineer, you may not be doing a lot of the artistic work though but there are firms who provide both services, architecture and design, that will appreciate your skills). Also, increasingly, structural engineering industry is seeking out candidates with a Masters degree. I do not know how this will fit into your plan and this is something a lot of bachelor's students do. Most of the time, masters if funded by a research program at the university and so it is rarely a problem.
The plan seems well thought out and is achievable. Something additional to just the technical study is reviewing your goals, as i stated earlier, structural engineering does not always come with a lot of artistic stuff, we provide creative solutions to accomplish a task but we don't typically do the architecture. If that is something you are okay with then it is alright. For this, I suggest interacting with practicing structural engineers and designers. Interacting with architects will also help you understand their role.